JPH0447520A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH0447520A JPH0447520A JP15720490A JP15720490A JPH0447520A JP H0447520 A JPH0447520 A JP H0447520A JP 15720490 A JP15720490 A JP 15720490A JP 15720490 A JP15720490 A JP 15720490A JP H0447520 A JPH0447520 A JP H0447520A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- chromium
- cobalt alloy
- recording
- face
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 24
- 229910000531 Co alloy Inorganic materials 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 10
- 239000013078 crystal Substances 0.000 claims abstract description 5
- 230000005415 magnetization Effects 0.000 claims abstract description 4
- 239000010409 thin film Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052804 chromium Inorganic materials 0.000 abstract description 9
- 239000011651 chromium Substances 0.000 abstract description 9
- 239000010408 film Substances 0.000 abstract description 6
- 238000004544 sputter deposition Methods 0.000 abstract description 5
- 229910000599 Cr alloy Inorganic materials 0.000 abstract description 4
- 239000000788 chromium alloy Substances 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 229910052715 tantalum Inorganic materials 0.000 abstract description 2
- 229910052719 titanium Inorganic materials 0.000 abstract description 2
- 229910052720 vanadium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 21
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気記録媒体に係り、とくに、コンピュータ
の外部記憶装置用として好適な磁気記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording medium, and particularly to a magnetic recording medium suitable for use in an external storage device of a computer.
〔従来の技術］
従来の磁気記録媒体は、非強磁性基板と、この基板上に
設けられた非強磁性金属層と、その金属層の上に形成さ
れた磁化記録層と、この磁化記録層を保護する保護層及
び潤滑層とを有している。[Prior Art] A conventional magnetic recording medium consists of a non-ferromagnetic substrate, a non-ferromagnetic metal layer provided on this substrate, a magnetic recording layer formed on the metal layer, and this magnetic recording layer. It has a protective layer and a lubricating layer for protecting the .
この従来技術における磁気記録媒体にあって、本来、垂
直異方性が強いコバルト合金磁性媒体を長手方向の記録
に用いるためには、磁性層の下に非磁性層を設定しなけ
ればならない。In this conventional magnetic recording medium, in order to use a cobalt alloy magnetic medium, which inherently has strong perpendicular anisotropy, for recording in the longitudinal direction, a nonmagnetic layer must be provided under the magnetic layer.
しかしながら、磁気特性の改善を意図してこの磁気異方
性を厳密に設定することは、従来より非常に困難なもの
とされていた。However, it has conventionally been extremely difficult to strictly set this magnetic anisotropy with the intention of improving magnetic properties.
〔発明の目的］
本発明の目的は、かかる従来例の有する不都合を改善し
、とくに垂直異方性の強いコバルト合金磁性媒体を長手
方向の記録に使用し得るようにし、これによって水平記
録における高密度記録の向上を図った磁気記録媒体を提
供することにある。[Object of the Invention] The object of the present invention is to improve the disadvantages of the conventional example, to enable the use of cobalt alloy magnetic media with particularly strong perpendicular anisotropy for recording in the longitudinal direction, and thereby to improve the high performance in horizontal recording. An object of the present invention is to provide a magnetic recording medium with improved density recording.
本発明では、非強磁性部材から成る基板と、この基板上
に装着されて情報記録面に平行な所定の結晶面を有する
非強磁性金属層と、この非強磁性金属層の結晶面上に平
行な磁化容易軸を有する強磁性コバルト合金薄膜とを備
えている、という構成を採っている。これによって前述
した目的を達成しようとするものである。In the present invention, a substrate made of a non-ferromagnetic material, a non-ferromagnetic metal layer mounted on the substrate and having a predetermined crystal plane parallel to the information recording surface, and The structure includes a ferromagnetic cobalt alloy thin film having parallel easy axes of magnetization. This aims to achieve the above-mentioned purpose.
以下、本発明の一実施例を第１図に基づいて説明する。 An embodiment of the present invention will be described below with reference to FIG.
この第１図において、符号１は非強磁性部材としてのア
ルミニウムから成る基板を示す。In FIG. 1, reference numeral 1 indicates a substrate made of aluminum as a non-ferromagnetic member.
この基板１には、その表面に円周方向の溝（図示せず）
が形成されている。この溝は、当該溝に沿った粒子の並
びが良好なことから、磁気特性を改善する効果を備えて
いる。This substrate 1 has circumferential grooves (not shown) on its surface.
is formed. This groove has the effect of improving magnetic properties because the particles are well arranged along the groove.
この基板１上には、ニッケル・リン層２が付された後、
クロン合金下層３．コバルト合金磁性層４、保護膜５及
び潤滑膜６がスパッタリングの手法により順次エピタキ
シャル成長させコーティング層が形成されている。After a nickel-phosphorous layer 2 is applied on this substrate 1,
Chron alloy lower layer 3. A coating layer is formed by epitaxially growing a cobalt alloy magnetic layer 4, a protective film 5, and a lubricating film 6 in sequence by sputtering.
ここで、クロム下層形成の際、温度を１５０°Ｃ以上に
上げ、１０００〜４０００人／ｓｅｃでスパッタリング
を行ない厚みを５０〜２００人にすることで（１００）
面が下層表面になった状態でクロム層が形成される。こ
の際、クロム層に第２元素（Ｖ、Ｍｏ 、Ｔｉ 、Ｔａ
等）を添加するコトテ、第２元素析出により、クロムの
（１００）面を配向させる。これによりクロム合金下層
３が形成されている。Here, when forming the chromium lower layer, the temperature is raised to 150°C or higher, and sputtering is performed at 1000 to 4000 sputtering/sec to make the thickness 50 to 200 sputtering (100).
A chromium layer is formed with the surface facing the lower layer. At this time, a second element (V, Mo, Ti, Ta) is added to the chromium layer.
etc.), the (100) plane of chromium is oriented by precipitation of the second element. As a result, a chromium alloy lower layer 3 is formed.
すなわち、薄膜コバルト合金媒体の磁性を水平記録の点
で最適化するには、六方最密構造のコバルト原子群をＣ
軸を記録面に平行にして配向する必要がある。このため
には、コバルト原子をコバル）（１１０）又は（１００
）面に沿って整合した下層面に付着する必要がある。こ
のため、上述した如くクロム下層の原子の（２００）面
を基板１の記録面と平行にすることによって（１１０）
面に沿うクロム構造についてコバルト合金原子を付着す
ることが出来る。In other words, in order to optimize the magnetism of thin-film cobalt alloy media in terms of horizontal recording, the cobalt atoms in the hexagonal close-packed structure are
The axis must be oriented parallel to the recording surface. For this purpose, the cobalt atoms must be converted to cobal) (110) or (100
) must adhere to the underlying surface aligned along the plane. Therefore, as mentioned above, by making the (200) plane of the atoms in the lower chromium layer parallel to the recording surface of the substrate 1, the (110)
Cobalt alloy atoms can be attached to the chromium structure along the surface.
以上のように、本発明によると、クロム下層に第２元素
を添加することで、コバルト合金の［化容易軸がディス
ク表面に平行となり、高密度記録に最適な磁気特性を磁
気記録層に与えることができるという従来にない優れた
磁気記録媒体を提供することができる。As described above, according to the present invention, by adding a second element to the chromium underlayer, the easy axis of the cobalt alloy becomes parallel to the disk surface, giving the magnetic recording layer optimal magnetic properties for high-density recording. It is possible to provide an unprecedented and excellent magnetic recording medium that can perform the following functions.
第１図は本発明の一実施例を示す磁気記録媒体の一部を
示す断面図である。
１・・・アルミニウム基板、２・・・ニッケル・リン層
、３・・・クロム合金下層、４・・・コバルト合金磁性
層、５・・・保護膜、６・・・潤滑膜。
出願人 日 本 電 気 株式会社
代理人 弁理士 高 橋 勇
第
を
図FIG. 1 is a sectional view showing a part of a magnetic recording medium according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Aluminum substrate, 2... Nickel-phosphorous layer, 3... Chromium alloy lower layer, 4... Cobalt alloy magnetic layer, 5... Protective film, 6... Lubricating film. Applicant Nippon Electric Co., Ltd. Agent Patent Attorney Yudai Takahashi
Claims (1)
着されて情報記録面に平行な所定の結晶面を有する非強
磁性金属層と、この非強磁性金属層の結晶面上に平行な
磁化容易軸を有する強磁性コバルト合金薄膜とを備えて
いることを特徴とした磁気記録媒体。(1) A substrate made of a non-ferromagnetic material, a non-ferromagnetic metal layer mounted on the substrate and having a predetermined crystal plane parallel to the information recording surface, and a non-ferromagnetic metal layer on the crystal plane of the non-ferromagnetic metal layer. A magnetic recording medium comprising: a ferromagnetic cobalt alloy thin film having parallel easy axes of magnetization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15720490A JPH0447520A (en) | 1990-06-15 | 1990-06-15 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15720490A JPH0447520A (en) | 1990-06-15 | 1990-06-15 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447520A true JPH0447520A (en) | 1992-02-17 |
Family
ID=15644483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15720490A Pending JPH0447520A (en) | 1990-06-15 | 1990-06-15 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740383B2 (en) | 1998-05-27 | 2004-05-25 | Fujitsu Limited | Magnetic recording medium possessing a ratio of Hc(perpendicular) to Hc(horizontal) that is not more than 0.22 and magnetic recording disk device |
| US6792788B2 (en) | 2001-02-15 | 2004-09-21 | Institute Of Technology Precision Electrical Discharge Work's | Pressurizer |
-
1990
- 1990-06-15 JP JP15720490A patent/JPH0447520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740383B2 (en) | 1998-05-27 | 2004-05-25 | Fujitsu Limited | Magnetic recording medium possessing a ratio of Hc(perpendicular) to Hc(horizontal) that is not more than 0.22 and magnetic recording disk device |
| US6792788B2 (en) | 2001-02-15 | 2004-09-21 | Institute Of Technology Precision Electrical Discharge Work's | Pressurizer |
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