Magnetoresistive sensor having an anisotropic hard bias with...

Details Magnetoresistive sensor having an anisotropic hard bias with... Magnetoresistive sensor having an anisotropic hard bias with...

2006-12-22

2010-12-07

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07848065

ABSTRACT:
A magnetoresistive sensor having magnetically anisotropic bias layers for biasing the free layer of the sensor. Hard bias structures for biasing the magnetization of the free layer are formed at either side of the sensor stack, and each of the hard bias structure includes a hard magnetic layer that has a magnetic anisotropy to enhance the stability of the biasing. The hard bias structure can include a Cr under-layer having a surface that has been treated by a low power angled ion milling to form it with an anisotropic surface texture. A layer of Cr—Mo alloy is formed over the Cr under-layer and the hard magnetic material layer is formed over the Cr—Mo alloy layer. The anisotropic surface texture of the Cr layer induces an aligned crystalline structure in the hard magnetic layer that causes the hard magnetic layer to have a magnetic anisotropy.

REFERENCES:
patent: 6144534 (2000-11-01), Xue et al.
patent: 6185081 (2001-02-01), Simion et al.
patent: 6261468 (2001-07-01), Sato et al.
patent: 6315875 (2001-11-01), Sasaki
patent: 6353318 (2002-03-01), Sin et al.
patent: 6577477 (2003-06-01), Lin
patent: 6632474 (2003-10-01), Horng et al.
patent: 6636400 (2003-10-01), Pinarbasi et al.
patent: 6668443 (2003-12-01), Chien et al.
patent: 6813121 (2004-11-01), Pinarbasi
patent: 7050274 (2006-05-01), Seigler et al.
patent: 7189583 (2007-03-01), Drewes
patent: 7446987 (2008-11-01), Zhang et al.
patent: 2002/0051328 (2002-05-01), Hasagawa
patent: 2002/0126429 (2002-09-01), Min et al.
patent: 2004/0105192 (2004-06-01), Chien et al.
patent: 2004/0196597 (2004-10-01), Marinero
patent: 2008/0137237 (2008-06-01), Freitag et al.

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