JPS6244683B2 - - Google Patents
Info
- Publication number
- JPS6244683B2 JPS6244683B2 JP53132598A JP13259878A JPS6244683B2 JP S6244683 B2 JPS6244683 B2 JP S6244683B2 JP 53132598 A JP53132598 A JP 53132598A JP 13259878 A JP13259878 A JP 13259878A JP S6244683 B2 JPS6244683 B2 JP S6244683B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic head
- coercive force
- alloy
- cobalt
- 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.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000011162 core material Substances 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 230000035699 permeability Effects 0.000 description 7
- 239000000696 magnetic material Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
- Soft Magnetic Materials (AREA)
Description
この発明は磁気ヘツドに関し、特に高密度記録
用テープに適応できるように改良された磁性合金
を用いてなる磁気ヘツドの提供を目的とする。
磁気ヘツドに使用される従来の磁性材料として
は、センダスト、パーマロイ、フエライト等があ
る。しかし最近メタルテープのような高保磁力の
磁気テープが開発されているが、この種の磁気テ
ープに前記のような従来の磁性材料を用いて磁気
ヘツドを製造し、それを使用すれば、磁気的飽和
を生じて記録特性を損うおそれがある。メタルテ
ープのような高保磁力の磁気テープには前記材料
よりも一層飽和磁束密度(BS)が高い磁性材料
を使用することが望ましい。磁気ヘツド設計者の
要求はBSで12KG(1.2T)以上、好ましくは
15KG(1.5T)以上であるが、今までやむなくそ
れ以下の前記磁性材料を使用していた。
BSが著しく高い磁性材料としては、従来から
鉄50%(重量%、以下同じ)コバルト50%の組成
のいわゆるパーメンジコールが知られているが、
この材料はBSが高いものの、その他の磁気的特
性や電気的特性は磁気ヘツド用としては適しにく
く、このため磁気ヘツドとして使用されていなか
つた。すなわち磁気ヘツド材料としてはBSが高
いことのほかに透磁率(μ0)が高く、しかも保
磁力(HC)が低いことが要求されるのである。
その要求特性は磁気ヘツドの種類によつて異な
り、一概に決めることはできない。特にICの進
歩により透磁率(μ0)はかなり低くても良くな
つているが、それにしても50Co―50Fe合金のμ
0が1000程度では苦しい。又、帯磁の問題を考え
ると、50Co―50Fe合金の数Oeでは大きく、やは
り苦しい。
また磁気ヘツド用の材料としては、高周波領域
での渦電流損失を少なくするため電気抵抗が大き
いことが要求されるが、50Co―50Fe合金の電気
抵抗(体積抵抗率)ρはパーマロイ等と比べ小さ
い。
この発明はこの点にかんがみなされたもので、
高密度記録を行なう高保磁力磁気テープ用の磁気
ヘツドを提供するものである。すなわち25〜70%
コバルト(Co)―鉄(Fe)系合金に、クロム
(Cr)、タングステン(W)、モリブデン(Mo)、
タンタル(Ta)、マンガン(Mn)、ニオブ
(Nb)、銅(Cu)、バナジウム(V)、ゲルマニウ
ム(Ge)、アルミニウム(Al)、けい素(Si)、チ
タン(Ti)の少なくとも1種を10%以下添加し
(Feの一部をおきかえる形で添加)、飽和磁束密
度をそれほど低下させずに透磁率と保磁力を改善
して、更に電気抵抗をあげた磁性合金をコア材と
して磁気ヘツドを形成するものである。
鉄―コバルト系材料においてコバルトが30%程
度残部が鉄の場合にBSが最も大きくなるが、透
磁率(μ0)はコバルトが50%程度残部が鉄の場
合に最も大きくなる。したがつてこの発明におい
ても、コバルトの量と鉄の量を等しくするのが好
ましいが、実用上25〜70%程度であれば問題はな
く、コバルトの添加量は25〜70%、好ましくは45
〜55%とする。
Cr、W、Mo、Ta、Mn、Nb、Cu、V、Ge、
Al、Si、Tiの少なくとも1種を合量で10%以下
添加することは、保磁力(HC)の低下、透磁率
(μ0)の向上等の磁気特性の改善に多大な効果
があり、かつ電気抵抗(ρ)を上昇させる。しか
し合量で10%を越えて添加すると、飽和磁束密度
(BS)が減少するので、高保磁力磁気テープ用磁
気ヘツドとしての意味がうすれてくると共に、透
磁率も低くなりやすくなるので、10%以下とし
た。
この発明の実施例を次に説明する。所定成分に
溶解したインゴツトを熱間および冷間加工して1
mm厚の板材とし、ここから外径10mm、内径6mmの
リング試料を切削して作成し、熱処理して材料特
性を測定すると共に、産業用特殊ヘツドを製作し
て高入力時の特性と帯磁を調べた。この発明の磁
気ヘツドと従来のパーマロイ等からなる磁気ヘツ
ドとを同条件のもとで特性を比較した。以下の第
1表にその結果を示す。
The present invention relates to a magnetic head, and more particularly, an object of the present invention is to provide a magnetic head using an improved magnetic alloy so as to be applicable to high-density recording tapes. Conventional magnetic materials used in magnetic heads include sendust, permalloy, and ferrite. However, recently, magnetic tapes with high coercive force such as metal tapes have been developed, but if a magnetic head is manufactured using the conventional magnetic materials mentioned above for this type of magnetic tape and used, magnetic There is a risk that saturation may occur and recording characteristics may be impaired. For magnetic tapes with high coercive force such as metal tapes, it is desirable to use magnetic materials with higher saturation magnetic flux density (B S ) than the above-mentioned materials. Magnetic head designers require B S of 12KG (1.2T) or more, preferably
The magnetic material is 15KG (1.5T) or more, but up until now we have been forced to use magnetic materials that are less than 15KG (1.5T). So-called permendicol, which has a composition of 50% iron (by weight, same hereinafter) and 50% cobalt, has been known as a magnetic material with an extremely high B S .
Although this material has a high B S , other magnetic and electrical properties are not suitable for use in magnetic heads, and for this reason it has not been used as magnetic heads. That is, in addition to high B S , magnetic head materials are required to have high magnetic permeability (μ 0 ) and low coercive force (H C ). The required characteristics differ depending on the type of magnetic head and cannot be determined unconditionally. In particular, with the progress of IC, the magnetic permeability (μ 0 ) has become good even if it is quite low, but even so, the μ 0 of the 50Co-50Fe alloy
If 0 is around 1000, it will be difficult. Also, considering the problem of magnetization, the problem is large and difficult for several Oe of 50Co-50Fe alloy. Furthermore, materials for magnetic heads are required to have high electrical resistance in order to reduce eddy current loss in the high frequency range, but the electrical resistance (volume resistivity) ρ of 50Co-50Fe alloy is smaller than that of permalloy, etc. . This invention was made with this in mind.
The present invention provides a magnetic head for a high coercive force magnetic tape that performs high density recording. i.e. 25-70%
Cobalt (Co)-iron (Fe) based alloy, chromium (Cr), tungsten (W), molybdenum (Mo),
At least one of tantalum (Ta), manganese (Mn), niobium (Nb), copper (Cu), vanadium (V), germanium (Ge), aluminum (Al), silicon (Si), and titanium (Ti). A magnetic head is made of a magnetic alloy with 10% or less addition (added by replacing a portion of Fe) to improve permeability and coercive force without significantly reducing saturation magnetic flux density, and further increase electrical resistance. It forms the In an iron-cobalt material, B S is the largest when the cobalt content is about 30% and the balance is iron, but the magnetic permeability (μ 0 ) is largest when the cobalt content is about 50% and the balance is iron. Therefore, in this invention as well, it is preferable that the amount of cobalt and the amount of iron be equal, but in practice there is no problem if it is about 25 to 70%, and the amount of cobalt added is 25 to 70%, preferably 45%.
~55%. Cr, W, Mo, Ta, Mn, Nb, Cu, V, Ge,
Adding at least one of Al, Si, and Ti in a total amount of 10% or less has a great effect on improving magnetic properties such as lowering coercive force (H C ) and improving magnetic permeability (μ 0 ). , and increases electrical resistance (ρ). However, if the total amount exceeds 10%, the saturation magnetic flux density (B S ) decreases, making it less useful as a magnetic head for high coercive force magnetic tapes, and the magnetic permeability tends to decrease. % or less. An embodiment of this invention will be described below. Hot and cold processing is performed on ingots dissolved in predetermined ingredients.
A ring sample with an outer diameter of 10 mm and an inner diameter of 6 mm was cut from a plate material with a thickness of mm, and was heat-treated to measure the material properties.A special head for industrial use was also fabricated to determine the characteristics at high input and magnetization. Examined. The characteristics of the magnetic head of the present invention and a conventional magnetic head made of permalloy or the like were compared under the same conditions. The results are shown in Table 1 below.
【表】【table】
【表】
この表のうち、試料番号1〜16がこの発明のも
ので、試料番号17および18は従来例のものであ
る。
この表により明らかなように、この発明の磁気
ヘツドは従来のパーマロイ等の磁気ヘツドと比較
して、B10(即ちBS)が著しく高く、このことに
より高入力時にも高い出力レベルを得ることがで
きる。又、帯磁も50%Co合金コアに比べて改善
されている。すなわちこの発明の磁気ヘツドは、
そのコア材として飽和磁束密度が従来の磁気ヘツ
ド材料よりもきわめて高く、しかも透磁率が十分
に高いとともに保磁力が十分低く、かつ電気抵抗
を上昇させたFe―Co系合金を使用しているの
で、高保磁力磁気テープ用磁気ヘツドとして利用
すれば、そのテープの性能を十分に引き出すこと
ができ、工業的にきわめて有用なものである。[Table] In this table, sample numbers 1 to 16 are of the present invention, and sample numbers 17 and 18 are of the conventional example. As is clear from this table, the magnetic head of the present invention has significantly higher B 10 (i.e., B S ) than conventional magnetic heads made of permalloy, etc., and as a result, it is possible to obtain a high output level even at high input. Can be done. Also, magnetization is improved compared to the 50% Co alloy core. That is, the magnetic head of this invention is
The core material used is an Fe-Co alloy that has a saturation magnetic flux density that is much higher than conventional magnetic head materials, has sufficiently high magnetic permeability, sufficiently low coercive force, and has increased electrical resistance. If used as a magnetic head for a high coercive force magnetic tape, the performance of the tape can be fully brought out, making it extremely useful industrially.
Claims (1)
モリブデン、タンタル、マンガン、ニオブ、銅、
バナジウム、ゲルマニウム、アルミニウム、けい
素、チタンの少なくとも1種以上を合量にて10%
以下、残部鉄でなる磁性合金をコア材として用い
てなる高保磁力磁気テープ用磁気ヘツド。1 25-70% cobalt, chromium, tungsten,
Molybdenum, tantalum, manganese, niobium, copper,
10% of at least one of vanadium, germanium, aluminum, silicon, and titanium in total
The following describes a magnetic head for a high coercive force magnetic tape using a magnetic alloy with the balance being iron as a core material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13259878A JPS5559701A (en) | 1978-10-30 | 1978-10-30 | Magnetic head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13259878A JPS5559701A (en) | 1978-10-30 | 1978-10-30 | Magnetic head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5559701A JPS5559701A (en) | 1980-05-06 |
JPS6244683B2 true JPS6244683B2 (en) | 1987-09-22 |
Family
ID=15085074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13259878A Granted JPS5559701A (en) | 1978-10-30 | 1978-10-30 | Magnetic head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5559701A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6021356A (en) * | 1983-07-14 | 1985-02-02 | Nec Corp | Soft magnetic alloy with high saturation magnetization and high magnetic permeability |
JPH0832949B2 (en) * | 1987-12-28 | 1996-03-29 | 富士通株式会社 | Method for manufacturing iron-cobalt based soft magnetic material |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53113216A (en) * | 1977-03-15 | 1978-10-03 | Furukawa Electric Co Ltd:The | High magnetic permeable amorphous alloy excellent in corrosion resistance |
-
1978
- 1978-10-30 JP JP13259878A patent/JPS5559701A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53113216A (en) * | 1977-03-15 | 1978-10-03 | Furukawa Electric Co Ltd:The | High magnetic permeable amorphous alloy excellent in corrosion resistance |
Also Published As
Publication number | Publication date |
---|---|
JPS5559701A (en) | 1980-05-06 |
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