发明授权
- 专利标题: Magnetic head
- 专利标题(中): 磁头
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申请号: US955907申请日: 1997-10-23
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公开(公告)号: US5856899A公开(公告)日: 1999-01-05
- 发明人: Kinya Aoyagi , Tokuo Nakamura , Hiroshi Yamagami , Seiichi Abiko , Masahiro Iizuka , Satoshi Maki
- 申请人: Kinya Aoyagi , Tokuo Nakamura , Hiroshi Yamagami , Seiichi Abiko , Masahiro Iizuka , Satoshi Maki
- 申请人地址: JPX Tokyo
- 专利权人: Alps Electric Co., Ltd.
- 当前专利权人: Alps Electric Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-280932 19961023
- 主分类号: G11B5/10
- IPC分类号: G11B5/10 ; G11B5/105 ; G11B5/133 ; G11B5/193 ; G11B5/23 ; H01F1/34 ; G11B5/235
摘要:
The magnetocrystalline anisotropic energy Kl is set to not more than 100 J/m.sup.3 and the absolute value of the magnetostriction in the direction, as the magnetic circuit direction, is reduced by appropriately selecting the ferrite material composition. Since the magnetocrystalline anisotropic energy Kl is small, the magnetoelastic energy largely affects the anisotropy of the crystallographic axis. The magnetoelastic energy is made negative and small in magnitude by adjusting the average coefficients of thermal expansion of the ferrite material and glass so as to apply a tensile stress around the magnetic gap of the magnetic head. The direction, i.e., magnetic circuit direction, is thereby allowed to coincide with a hard axis of magnetization. As a result, the permeability of the magnetic head is improved at high-frequency bands.