Invention Grant
US07029771B2 Magnetic sensor having free layer additionally provided with magnetic anisotropy by shape anisotropy 失效
具有自由层的磁传感器通过形状各向异性另外具有磁各向异性

Magnetic sensor having free layer additionally provided with magnetic anisotropy by shape anisotropy
Abstract:
An intermediate region is formed at a central portion of an element in a track width direction, and an antiferromagnetic layer is not provided at the intermediate region. Accordingly, a sense current can be prevented from being shunted to the intermediate region, and as a result, improvement in reproduction output and strength against magnetic electrostatic damage can be realized. In addition, since the thickness of the central portion of the element is decreased, trend toward narrower gap can be realized. Furthermore, since the direction of magnetization of a free magnetic layer is oriented in the track width direction by shape anisotropy, means for orienting the magnetization is not necessary, and hence the structure and manufacturing method of the element can be simplified.
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