IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0786840
(2004-02-25)
|
| 등록번호 |
US-7294418
(2007-11-13)
|
| 우선권정보 |
JP-2003-192020(2003-07-04) |
|
발명자
/ 주소 |
- Ikeda,Shoji
- Kubomiya,Takayuki
- Matsuoka,Masaaki
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Greer, Burns & Crain, Ltd
|
| 인용정보 |
피인용 횟수 :
9 인용 특허 :
11 |
초록
▼
The magnetic film includes an FeCo layer, restrains erasing data by a magnetic field leaked from a magnetic pole, has high saturation magnetic flux density and soft magnetism and writes data with high recording density. The magnetic film for a magnetic head of the present invention comprises: a non
The magnetic film includes an FeCo layer, restrains erasing data by a magnetic field leaked from a magnetic pole, has high saturation magnetic flux density and soft magnetism and writes data with high recording density. The magnetic film for a magnetic head of the present invention comprises: a nonmagnetic layer including at least one selected from a group of Ru, Rh, Ir, Cr, Cu, Au, Ag, Pt and Pd; a magnetic layer including Fe and Co. Anisotropy magnetic field is 0.8 kA/m or more.
대표청구항
▼
What is claimed is: 1. A laminated magnetic film for a magnetic head, comprising: a nonmagnetic layer including at least one selected from a group consisting of Ru, Rh, Ir, Cu, Au, Ag, Pt and Pd; and a magnetic layer including Fe and Co, wherein an anisotropy magnetic field is 0.8 kA/m or more, whe
What is claimed is: 1. A laminated magnetic film for a magnetic head, comprising: a nonmagnetic layer including at least one selected from a group consisting of Ru, Rh, Ir, Cu, Au, Ag, Pt and Pd; and a magnetic layer including Fe and Co, wherein an anisotropy magnetic field is 0.8 kA/m or more, wherein a diffraction intensity ratio|(211)/|(110) of each of the magnetic layers is 10-100%, and wherein a thickness of each of the magnetic layers is 20-380 nm. 2. The laminated magnetic film according to claim 1, wherein the saturation magnetic flux density has uniaxial magnetic anisotropy, and residual stress in said film is between approximately-0.5 Gpa and +0.5 Gpa. 3. The laminated magnetic film according to claim 1, wherein roughness of the surface of said magnetic layer is 2 nm or less. 4. The laminated magnetic film according to claim 1, wherein total saturation magnetic flux density is 2.0 T or more. 5. A multilayered film for a magnetic head, comprising: two or more nonmagnetic layers; and two or more magnetic layers, wherein each of the nonmagnetic layers includes at least one element selected from a group of Ru, Rh, Ir, Cr, Au, Ag, Pt and Pd, wherein each of the magnetic layers includes Fe and Co, and wherein a saturated magnetic field is 0.8 kA/m or more, wherein a driffraction intensity ratio |(211)/|(110) of each of the magnetic layers is 10-100%, and wherein a thickness of each of the magnetic layers is 20-380 nm. 6. The multilayered film according to claim 5, wherein the saturation magnetic flux density has uniaxial magnetic anisotropy, and residual stress in said film is between approximately-0.5 Gpa and +0.5 Gpa. 7. The multilayered film according to claim 5, wherein roughness of the surface of said film is 2 nm or less. 8. The multilayered film according to claim 5, wherein total saturation magnetic flux density is 2.0 T or more.
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