发明名称 |
Method of making a dual GMR read head with self-pinned layer and specular reflector |
摘要 |
A dual GMR or dual spin valve sensor has a self-pinned layer which has its magnetic moment pinned perpendicular to an air bearing surface by sense current fields from conductive layers in the dual spin valve sensor when a sense current is conducted therethrough. This scheme eliminates one of the antiferromagnetic pinning layers which is typically employed in a dual GMR or dual spin valve sensor. The self-pinned layer is thin so that its demagnetization field will not be greater than the sense current fields acting thereon. Because of the thinning of the self-pinned layer the spin valve effect of the spin valve sensor is degraded by scattering of conduction electrons at the boundary of the self-pinned layer. In order to overcome this problem a specular reflector layer is employed in contact with the self-pinned layer for reflecting the conduction electrons back into a mean free path of conduction electrons so that the spin valve effect on the self-pinned layer side of the spin valve sensor can be added to another spin valve effect on the other side of the free layer structure for providing a double spin valve effect with an improved read gap, as compared to prior art dual spin valve sensors.
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申请公布号 |
US6655008(B2) |
申请公布日期 |
2003.12.02 |
申请号 |
US20010760937 |
申请日期 |
2001.01.16 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B. V. |
发明人 |
GILL HARDAYAL SINGH |
分类号 |
G11B5/39;(IPC1-7):G11B5/127;H04R31/00 |
主分类号 |
G11B5/39 |
代理机构 |
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地址 |
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