JPH0278042A - Magneto-optical recording medium and device used for this medium - Google Patents
Magneto-optical recording medium and device used for this mediumInfo
- Publication number
- JPH0278042A JPH0278042A JP23080588A JP23080588A JPH0278042A JP H0278042 A JPH0278042 A JP H0278042A JP 23080588 A JP23080588 A JP 23080588A JP 23080588 A JP23080588 A JP 23080588A JP H0278042 A JPH0278042 A JP H0278042A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- magnetic layer
- recording medium
- magnetic field
- magnetization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005415 magnetization Effects 0.000 abstract description 29
- 230000007423 decrease Effects 0.000 abstract description 9
- 230000004907 flux Effects 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 77
- 239000000758 substrate Substances 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、垂直磁化層及び軟磁性層を有する光磁気記録
媒体とこれに使用する光磁気記録装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magneto-optical recording medium having a perpendicular magnetic layer and a soft magnetic layer, and a magneto-optical recording device used therein.
レーザ光等の高エネルギビームを用いて記録媒体に高密
度に情報を記録する方式の一つとして、磁界変調方式が
、知られる。A magnetic field modulation method is known as one of the methods for recording information in a recording medium with high density using a high-energy beam such as a laser beam.
第３図は、特開昭６１−１８８７５８号に開示されてい
る如き磁界変調方式を用いる光磁気記録装置の要部を示
す模式図である。記録媒体１は基板１１に軟磁性層１３
．垂直磁化層１２の順に積層されてなり、基板側の上方
には記録媒体１にレーザ光３を照射する光Ｓ（図示せず
）及びレーザ光３を垂直磁化層１２上に集束するレンズ
２が配され、また、垂直磁化層１２の下方には、スタイ
ラズ状の磁極及びこれと対をなす磁極を有する非対象の
０字型の鉄心とコイル５とからなる磁気ヘッド４が配さ
れる。FIG. 3 is a schematic diagram showing the main parts of a magneto-optical recording device using a magnetic field modulation method as disclosed in Japanese Patent Application Laid-Open No. 188758/1983. The recording medium 1 has a soft magnetic layer 13 on a substrate 11.
．． The perpendicular magnetization layer 12 is laminated in this order, and above the substrate side there is a light S (not shown) for irradiating the recording medium 1 with a laser beam 3 and a lens 2 for focusing the laser beam 3 onto the perpendicular magnetization layer 12. Further, below the perpendicular magnetization layer 12, a magnetic head 4 is arranged, which includes a coil 5 and an asymmetrical zero-shaped iron core having a stylus-shaped magnetic pole and a magnetic pole paired with the magnetic pole.
垂直磁化層１２は予め一方向に磁化されており、この垂
直磁化層１２にレーザ光３を照射して加熱すると昇温し
で保磁力が低下し、数百０ｅ程度の外部磁界によって磁
化の向きが反転する。また、情報を記録または消去しよ
うとする垂直磁化層１２の部分をレーザ光３で加熱しな
がら、磁気へラド４のコイル５に電流を流せば、磁気ヘ
ッド４から垂直磁化層１２を経て軟磁性層１３へ磁束８
が流れて数百Ｏｅの磁界が生じる。従って、コイル５に
流す電流を正負に変調し、記録または消去する情報に応
じて磁界の向きを変化させると、この磁界の向きに垂直
磁化層１２の磁界の向きが揃い、情報が記録または消去
される。The perpendicular magnetization layer 12 is magnetized in one direction in advance, and when the perpendicular magnetization layer 12 is heated by irradiating the laser beam 3, the temperature rises and the coercive force decreases, and the direction of magnetization is changed by an external magnetic field of about several hundred 0e. is reversed. In addition, if a current is passed through the coil 5 of the magnetic head 4 while heating the part of the perpendicular magnetic layer 12 where information is to be recorded or erased with the laser beam 3, soft magnetic Magnetic flux 8 to layer 13
flows, generating a magnetic field of several hundred Oe. Therefore, when the current flowing through the coil 5 is modulated positively or negatively and the direction of the magnetic field is changed according to the information to be recorded or erased, the direction of the magnetic field of the perpendicular magnetic layer 12 is aligned with the direction of this magnetic field, and the information is recorded or erased. be done.
以上のような従来の光磁気記録装置では、情報の記録、
消去の際に印加する外部磁界が数百Ｏｅと大きいため、
磁気へラド４を垂直磁化層１２から数百μ霞以内に設置
しなければならず、磁気ヘッド４が接触して記録媒体の
表面に傷をつけ易く、また両面仕様の記録媒体は、磁気
ヘッド４と反対側のレーザ光源寄りに配された垂直磁化
層１２が記録。Conventional magneto-optical recording devices such as those described above are capable of recording information,
Because the external magnetic field applied during erasing is as large as several hundred Oe,
The magnetic head 4 must be placed within several hundred micrometers from the perpendicular magnetization layer 12, and the magnetic head 4 is likely to come into contact with it and damage the surface of the recording medium. A perpendicular magnetization layer 12 arranged near the laser light source on the opposite side of 4 records data.
消去対象となるため、片面仕様の場合よりも磁気ヘッド
４から遠ざかった垂直磁化層１２を大きい外部磁界によ
って磁化するには磁気へラド４を片面仕様の場合よりも
記録媒体に近づけなければならないが、片面仕様でも既
に記録媒体から数百μｍ以内という至近距離に磁気ヘッ
ド４を設置しなければ所要強度の磁界が得られないので
あれば、片面仕様以上に磁気ヘッド４を記録媒体に近づ
けなければならない両面仕様の記録媒体は使用できない
という問題があった。In order to magnetize the perpendicular magnetization layer 12, which is farther away from the magnetic head 4 than in the case of a single-sided specification, by a large external magnetic field, the magnetic head 4 must be brought closer to the recording medium than in the case of a single-sided specification. , even with the single-sided specification, if the magnetic head 4 must be installed within a few hundred μm from the recording medium to obtain a magnetic field of the required strength, then the magnetic head 4 must be brought closer to the recording medium than the single-sided specification. There was a problem in that recording media with double-sided specifications could not be used.
本発明はこのような問題を解決するためになされたもの
であって、磁気ヘッドの接触による記録媒体の損傷を回
避した光磁気記録媒体及びこれに用いる装置の提供を目
的とする。The present invention has been made to solve these problems, and aims to provide a magneto-optical recording medium that avoids damage to the recording medium due to contact with a magnetic head, and a device used therefor.
本発明の光磁気記録媒体は、情報を記録、消去する際に
、磁気ヘッド側に配される方゛から軟磁性層、垂直磁化
層の順に積層されてなることを特徴とし、またはその軟
磁性層同士を対向させた２組が接着された両面仕様であ
ることを特徴とする。The magneto-optical recording medium of the present invention is characterized in that, when recording and erasing information, a soft magnetic layer and a perpendicular magnetic layer are laminated in this order from the one disposed on the magnetic head side, or the soft magnetic layer It is characterized by a double-sided design in which two sets of opposing layers are glued together.
また、本発明の光磁気記録装置は、軟磁性層を所定の一
方向に面内磁化し得る強度の磁界を発生する磁気ヘッド
と、垂直磁化層及び該垂直磁化層に対応する軟磁性層を
同時的に所定温度まで加熱する高エネルギビーム光源と
を備えたことを特徴とする。Further, the magneto-optical recording device of the present invention includes a magnetic head that generates a magnetic field strong enough to in-plane magnetize a soft magnetic layer in one predetermined direction, a perpendicular magnetic layer, and a soft magnetic layer corresponding to the perpendicular magnetic layer. It is characterized by comprising a high-energy beam light source that simultaneously heats up to a predetermined temperature.
本発明の光磁気記録装置は、高エネルギビーム光源が、
光磁気記録媒体の垂直磁化層及び該垂直磁化層に対応す
る軟磁性層を同時的に所定温度まで加熱する一方、磁気
ヘッドが所定強度の磁界を発生して該軟磁性層を所定の
一方向に面内磁化し、前述の如く加熱されることにより
磁化の減少した軟磁性層から洩れる洩れ磁界により、加
熱によって保磁力が低下した垂直磁化層の磁化方向が洩
れ磁界の磁化方向に揃い、情報が記録、消去される。In the magneto-optical recording device of the present invention, a high-energy beam light source
While the perpendicular magnetic layer and the soft magnetic layer corresponding to the perpendicular magnetic layer of the magneto-optical recording medium are simultaneously heated to a predetermined temperature, the magnetic head generates a magnetic field of a predetermined intensity to move the soft magnetic layer in a predetermined direction. Due to the leakage magnetic field leaking from the soft magnetic layer, which is in-plane magnetized and whose magnetization has decreased due to heating as described above, the magnetization direction of the perpendicularly magnetized layer whose coercive force has decreased due to heating is aligned with the magnetization direction of the leakage magnetic field, and information is transmitted. is recorded and erased.
以下、本発明をその実施例を示す図面に基づき詳述する
。第１図は本発明に係る光磁気記録媒体及びこれに用い
る光磁気記録装置の要部を示す模式図である０図中１は
情報を記録または消去すべく後述する磁気ヘッド４上方
に水平に設置された記録媒体であって、下から軟磁性層
１３、垂直磁化層１２、基板１１の順に積層されており
、垂直磁化層１２は情報を記録すべく予め一方向に磁化
されているか、または既に情報に応じて各方向に磁化さ
れている。基板１１上方にはレーザ光３を記録媒体１に
照射する光源（図示せず）及び照射するレーザ光３を記
録媒体１の垂直磁化層１２上に集光するレンズ２が配設
されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof. FIG. 1 is a schematic diagram showing the main parts of a magneto-optical recording medium and a magneto-optical recording device used therein according to the present invention. 0 in FIG. The installed recording medium has a soft magnetic layer 13, a perpendicular magnetic layer 12, and a substrate 11 laminated in this order from the bottom, and the perpendicular magnetic layer 12 is magnetized in advance in one direction to record information, or It has already been magnetized in each direction depending on the information. A light source (not shown) that irradiates the recording medium 1 with a laser beam 3 and a lens 2 that focuses the irradiated laser beam 3 onto the perpendicular magnetization layer 12 of the recording medium 1 are provided above the substrate 11 .
また、軟磁性層１３の下方には、コイル５を備えた磁気
ヘッド４が対称的なＵ字型鉄心の対向する磁極を水平に
定めて配設され、記録媒体１は磁気ヘッド４から所定距
離離隔して設置される。Further, below the soft magnetic layer 13, a magnetic head 4 equipped with a coil 5 is arranged with opposing magnetic poles of a symmetrical U-shaped core horizontally defined, and the recording medium 1 is placed at a predetermined distance from the magnetic head 4. installed separately.
以上のような構成の光磁気記録装置における情報の記録
、消去の手順につき説明する。記録媒体１の垂直磁化層
１２において情報を記録、消去しようとする位置に、隣
接する軟磁性層１３の対応位置を含めて、レーザ光３を
レンズ２を介して集光すると、両層がスポット状に加熱
され、垂直磁化層１２の保磁力は低下して外部磁界によ
り磁化反転が可能な状態となり、また軟磁性層１３は磁
化が減少する。一方、磁気ヘッド４のコイル５に電流を
流し、記録、消去しようとする情報に応じた所要方向の
磁界を発生させて軟磁性層１３を所定の一方向に面内磁
化すれば、前述の如くレーザ光３の照射により磁化が減
少した部分で軟磁性層１３０面内磁界の磁束６が垂直磁
化層１２の方向へ洩れ、この洩れ磁界により垂直磁化層
１２の保磁力が低下した部分の磁化が洩れ磁界の方向に
揃い、情報が記録または消去される。The procedure for recording and erasing information in the magneto-optical recording device configured as above will be explained. When the laser beam 3 is focused through the lens 2 on the position where information is to be recorded or erased in the perpendicular magnetic layer 12 of the recording medium 1, including the corresponding position on the adjacent soft magnetic layer 13, both layers become a spot. The coercive force of the perpendicular magnetic layer 12 decreases, and the magnetization can be reversed by an external magnetic field, and the magnetization of the soft magnetic layer 13 decreases. On the other hand, if a current is applied to the coil 5 of the magnetic head 4 to generate a magnetic field in a predetermined direction according to the information to be recorded or erased, and the soft magnetic layer 13 is in-plane magnetized in a predetermined direction, as described above, The magnetic flux 6 of the in-plane magnetic field of the soft magnetic layer 130 leaks in the direction of the perpendicular magnetic layer 12 in the portion where the magnetization has decreased due to the irradiation with the laser beam 3, and this leaked magnetic field causes the magnetization of the portion of the perpendicular magnetic layer 12 where the coercive force has decreased to decrease. Aligned in the direction of the leakage magnetic field, information is recorded or erased.
従って、記録媒体１に印加する外部磁界は、磁化の容易
な軟磁性層１３を所定方向に磁化し得る強度があればよ
く、例えば軟磁性層１３としてパーマロイを用いれば、
外部磁界は１００ｅ以下であっても磁界変調方式による
情報記録が可能である。Therefore, the external magnetic field applied to the recording medium 1 only needs to be strong enough to magnetize the easily magnetized soft magnetic layer 13 in a predetermined direction. For example, if permalloy is used as the soft magnetic layer 13,
Even if the external magnetic field is 100 e or less, information can be recorded using the magnetic field modulation method.
第１表は、垂直磁化層１２としてＴｂＦｅＣｏ膜、軟磁
性層１３としてパーマロイ膜を使用した場合における磁
気ヘッド４と記録媒体１との所要離隔距離及び各距離に
おける再生信号のＣ／Ｎ比を示したものである。第１表
から明らかなように、磁気へソド４と記録媒体とを３龍
離しても、Ｃ／Ｎ比は実用に支障のない約５５ｄＢが得
られる。従って、磁気へソド４と記録媒体１とは３ｆｉ
離して設置してもよいことが明らかである。Table 1 shows the required separation distance between the magnetic head 4 and the recording medium 1 and the C/N ratio of the reproduction signal at each distance when a TbFeCo film is used as the perpendicular magnetic layer 12 and a permalloy film is used as the soft magnetic layer 13. It is something that As is clear from Table 1, even if the magnetic head 4 and the recording medium are separated by 3 degrees, a C/N ratio of about 55 dB, which is acceptable for practical use, can be obtained. Therefore, the magnetic heel 4 and the recording medium 1 are 3fi.
It is clear that they may be installed separately.
第 １ 表
第２図は本発明に係る光磁気記録媒体の他の実施例を示
した模式図である。記録媒体１ａは両面仕様であって、
２組の基板１１ａ、ｌｌｂ 、垂直磁化層１２ａ。Table 1 and FIG. 2 are schematic diagrams showing other embodiments of the magneto-optical recording medium according to the present invention. The recording medium 1a is double-sided,
Two sets of substrates 11a, llb, and a perpendicular magnetic layer 12a.
１２ｂ及び軟磁性層１３ａ、１３ｂを、軟磁性層１３ａ
、 １３ｂ同士を対向させるように接着層１４を介して
接着しである。各組の構成層は前記実施例と同様のもの
である。また、レンズ２はレンズ２０１１Ｊに配された
一方の組の垂直磁化層１２ａまたは１２ｂ及びこれに対
応する他方の組の軟磁性層１３ｂまたは１３ａとにレー
ザ光３を集光し、磁気ヘッド４が情報を記録。12b and the soft magnetic layers 13a, 13b, the soft magnetic layer 13a
, 13b are bonded via the adhesive layer 14 so as to face each other. The constituent layers of each set are similar to those in the previous embodiment. Further, the lens 2 focuses the laser beam 3 on one set of perpendicular magnetic layers 12a or 12b arranged in the lens 2011J and the corresponding soft magnetic layer 13b or 13a of the other set, so that the magnetic head 4 Record information.
消去する垂直磁化層１２ａまたは１２ｂと対面する側の
軟磁性層１３ｂまたは１３ａを所定の一方向に面内磁化
する強度の磁界を発生する。A strong magnetic field is generated to in-plane magnetize the soft magnetic layer 13b or 13a facing the perpendicular magnetic layer 12a or 12b to be erased in one predetermined direction.
次に、その記録、消去の手順につき説明する。Next, the recording and erasing procedures will be explained.
第２図における記録媒体１ａの設置状態は光源に近い側
の垂直磁化層１２ａに情報を記録、消去しようとしてい
る状態を示す。情報を記録、消去しようとする垂直磁化
層１２ａ及び軟磁性層１３ａにレーザ光３をレンズ２を
介して集光し、スポット状に加熱すれば垂直磁化層１２
ａの保磁力が低下し、また軟磁性層１３ａの磁化が減少
する。一方、磁気ヘッド４のコイル５に電流を流し、記
録、消去しようとする情報に応じた所要方向の磁界を発
生させて軟磁性層１３ａを所要の一方向に面内磁化すれ
ば、前述の如くレーザ光３の照射により磁化が減少した
部分で軟磁性層１３ａの面内磁界の磁束が垂直磁化層１
２ａの方向へ洩れ、この洩れ磁界により垂直磁化層１２
ａの保磁力の低下した部分の磁化が洩れ磁界の方向に揃
い、情報が記録または消去される。The installed state of the recording medium 1a in FIG. 2 shows a state in which information is to be recorded or erased in the perpendicular magnetic layer 12a on the side closer to the light source. If a laser beam 3 is focused through a lens 2 on the perpendicular magnetic layer 12a and the soft magnetic layer 13a on which information is to be recorded or erased, and heated in a spot, the perpendicular magnetic layer 12
The coercive force of a decreases, and the magnetization of the soft magnetic layer 13a decreases. On the other hand, if a current is applied to the coil 5 of the magnetic head 4 to generate a magnetic field in a desired direction according to the information to be recorded or erased, and the soft magnetic layer 13a is in-plane magnetized in a desired direction, the result will be as described above. The magnetic flux of the in-plane magnetic field of the soft magnetic layer 13a changes to the perpendicular magnetic layer 1 in the portion where the magnetization has decreased due to the irradiation with the laser beam 3.
2a, and this leakage magnetic field causes the perpendicular magnetic layer 12 to
The magnetization of the portion of a where the coercive force has decreased is aligned in the direction of the leakage magnetic field, and information is recorded or erased.
また、反対側の垂直磁化層１２ｂに情報を記録。Information is also recorded in the perpendicular magnetic layer 12b on the opposite side.
消去する場合は、記録媒体１ａを裏返し、レンズ２によ
りレーザ光３を、対応する軟磁性層１３ｂを含む垂直磁
化層１２ｂの所定位置に集光してスポット状に加熱し、
前述と同様にして情報を記録、消去する。When erasing, the recording medium 1a is turned over, the laser beam 3 is focused by the lens 2 on a predetermined position of the perpendicular magnetization layer 12b including the corresponding soft magnetic layer 13b, and heated in the form of a spot.
Information is recorded and erased in the same manner as described above.
なお、前記２つの実施例において基板１１．ｌｌａ。Note that in the above two embodiments, the substrate 11. lla.
１１ｂと垂直磁化層１２．１２ａ、 １２ｂとの間、ま
たは垂直磁化層１２．１２ａ、 １２ｂと軟磁性層１３
．１３ａ、 １３ｂとの間に誘電体層、金属層等の保護
層を設けた場合であっても同様の効果が得られる。11b and the perpendicular magnetic layer 12.12a, 12b, or between the perpendicular magnetic layer 12.12a, 12b and the soft magnetic layer 13.
．． Similar effects can be obtained even when a protective layer such as a dielectric layer or a metal layer is provided between the electrodes 13a and 13b.
本発明の光磁気記録媒体は、情報を記録、消去する際に
磁気ヘッド側となる方から軟磁性層、垂直磁化層の順に
積層されてなり、光磁気記録装置によって磁化し易い軟
磁性層からの洩れ磁界を利用して垂直磁化層の磁化方向
を決定する構成とすることにより、印加する磁界強度が
低くてもよくなり、磁気ヘッドを記録媒体表面から充分
離隔できるため、磁気ヘッドの接触による記録媒体の損
傷が避けられ、記録情報の信頼性を高めるとともに記録
媒体を両面仕様としても磁気ヘッドを記録媒体と接触し
ないだけの充分な距離離隔して情報を記録、消去し得る
という優れた効果を奏する。The magneto-optical recording medium of the present invention has a soft magnetic layer and a perpendicular magnetization layer laminated in this order from the magnetic head side when recording and erasing information, starting with the soft magnetic layer that is easily magnetized by the magneto-optical recording device. By using a structure that determines the magnetization direction of the perpendicular magnetic layer by using the leakage magnetic field of This has the excellent effect of avoiding damage to the recording medium, increasing the reliability of recorded information, and even if the recording medium is double-sided, information can be recorded and erased at a sufficient distance so that the magnetic head does not come into contact with the recording medium. play.
第１図は本発明に係る光磁気記録媒体及びこれに用いる
光磁気記録装置の要部構成を示す模式図、第２図は本発
明に係る他の光磁気記録媒体の実施例構成を示す模式図
、第３図は従来の光磁気記録媒体及びこれに用いる光磁
気記録装置の要部構成を示す模式図である。
１．１ａ・・・記録媒体 ２・・・レンズ ３・・・レ
ーザ光４・・・磁気へラド ５・・・コイル ６・・・
磁束１１、ｌｌａ、１ｌｂ−・一基板 １２．１２ａ、
１２ｂ−垂直磁化層１３、１３ａ、 １３ｂ・・・軟
磁性層 １４・・・接着層なお、図中、同一符号は同一
、又は相当部分を示す。FIG. 1 is a schematic diagram showing the configuration of main parts of a magneto-optical recording medium according to the present invention and a magneto-optical recording device used therein, and FIG. 2 is a schematic diagram showing the configuration of another example of a magneto-optical recording medium according to the present invention. 3 are schematic diagrams showing the configuration of main parts of a conventional magneto-optical recording medium and a magneto-optical recording device used therefor. 1.1a... Recording medium 2... Lens 3... Laser light 4... Magnetic helad 5... Coil 6...
Magnetic flux 11, lla, 1lb-・One substrate 12.12a,
12b - Perpendicular magnetization layers 13, 13a, 13b... Soft magnetic layer 14... Adhesive layer In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (3)
方向の磁界が印加された垂直磁化層に情報が記録、消去
される光磁気記録媒体において、 情報を記録、消去する際に、磁界を印加する側に配され
る方から軟磁性層、垂直磁化層の順に積層されてなるこ
とを特徴とする光磁気記録媒体。(1) In a magneto-optical recording medium that has a soft magnetic layer and a perpendicular magnetic layer, and in which information is recorded and erased on the perpendicular magnetic layer that is heated and a magnetic field is applied in a predetermined direction, when recording and erasing information, A magneto-optical recording medium, characterized in that a soft magnetic layer and a perpendicular magnetic layer are laminated in this order from the side on which a magnetic field is applied.
なることを特徴とする光磁気記録媒体。(2) A magneto-optical recording medium characterized in that two pairs of soft magnetic layers facing each other are bonded together.
る光磁気記録装置において、 軟磁性層を所定の一方向に面内磁化し得る強度の磁界を
発生する磁気ヘッドと、 垂直磁化層及び該垂直磁化層に対応する軟磁性層を同時
的に所定温度まで加熱する高エネルギビーム光源と を備えたことを特徴とする光磁気記録装置。(3) A magneto-optical recording device for use in the magneto-optical recording medium according to claim 1 or 2, comprising: a magnetic head that generates a magnetic field strong enough to in-plane magnetize the soft magnetic layer in one predetermined direction; and a perpendicular magnetic layer. and a high-energy beam light source that simultaneously heats a soft magnetic layer corresponding to the perpendicularly magnetized layer to a predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23080588A JPH0278042A (en) | 1988-09-14 | 1988-09-14 | Magneto-optical recording medium and device used for this medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23080588A JPH0278042A (en) | 1988-09-14 | 1988-09-14 | Magneto-optical recording medium and device used for this medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0278042A true JPH0278042A (en) | 1990-03-19 |
Family
ID=16913552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23080588A Pending JPH0278042A (en) | 1988-09-14 | 1988-09-14 | Magneto-optical recording medium and device used for this medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0278042A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523944A2 (en) * | 1991-07-16 | 1993-01-20 | Canon Kabushiki Kaisha | Magneto optical recording medium and method |
| EP0621592A2 (en) * | 1993-04-23 | 1994-10-26 | Canon Kabushiki Kaisha | Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
-
1988
- 1988-09-14 JP JP23080588A patent/JPH0278042A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523944A2 (en) * | 1991-07-16 | 1993-01-20 | Canon Kabushiki Kaisha | Magneto optical recording medium and method |
| EP0523944A3 (en) * | 1991-07-16 | 1994-02-16 | Canon Kk | Magneto optical recording medium and method |
| EP0621592A2 (en) * | 1993-04-23 | 1994-10-26 | Canon Kabushiki Kaisha | Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
| EP0621592A3 (en) * | 1993-04-23 | 1995-03-08 | Canon Kk | Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same. |
| US5656384A (en) * | 1993-04-23 | 1997-08-12 | Canon Kabushiki Kaisha | Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
| US5793712A (en) * | 1993-04-23 | 1998-08-11 | Canon Kabushiki Kaisha | Magneto-optical reproducing method using a reproducing layer of horizontal magnetized state at room temperature |
| US5810979A (en) * | 1993-04-23 | 1998-09-22 | Canon Kabushiki Kaisha | Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100239812B1 (en) | Magneto-optic recording method and magneto-optic recording/reproducing apparatus | |
| JPS60236137A (en) | Simultaneously erasing-recording type photomagnetic recording system and recording device and medium used for this system | |
| JP3114204B2 (en) | Recording / reproducing method for optical recording medium | |
| JPH0448406A (en) | Magneto-optical recording and reproducing device and magnetic head | |
| JPS59152503A (en) | Optical pickup device | |
| JP3460947B2 (en) | Magneto-optical recording medium and magneto-optical recording device | |
| JPH0278042A (en) | Magneto-optical recording medium and device used for this medium | |
| KR920001459A (en) | Magneto-optical recording and reproducing method and magneto-optical recording and reproducing apparatus | |
| JP3496113B2 (en) | Information recording medium, information recording medium reproducing method, and information recording medium reproducing apparatus | |
| US5574703A (en) | Magneto-optical method and apparatus for recording/reproducing data | |
| JPS6171436A (en) | Optomagnetic recording medium | |
| JPS61188758A (en) | Photomagnetic recording system | |
| JP2964517B2 (en) | Magneto-optical pickup device | |
| JPS63302444A (en) | Magneto-optical recording medium | |
| JPH0226281B2 (en) | ||
| JP2597049B2 (en) | Magneto-optical recording / reproducing device | |
| JPH0242664A (en) | Thermo-magneto-optical recording medium, recording device thereof and thermomagneto-optical recording system using them | |
| JPS63244345A (en) | Magneto-optical recording medium | |
| JP2604702B2 (en) | Magneto-optical recording / reproduction / erasing method and apparatus | |
| JPS61172235A (en) | Recording and reproducing device for photomagnetic recording medium | |
| JP3146614B2 (en) | Recording method and recording apparatus for magneto-optical recording medium | |
| JP2000215402A (en) | Information recording medium, and method and device for recording and reproducing information | |
| JPS6258441A (en) | Photomagnetic recording and reproducing device | |
| JPH05274608A (en) | Magneto-optical disk device | |
| JPS63152050A (en) | Magnetic recording method |