Magnetic recording head and magnetic recording apparatus

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United States of America Patent

PATENT NO 8817419
APP PUB NO 20120002325A1
SERIAL NO

13171418

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Abstract

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According to one embodiment, a magnetic recording head includes a main magnetic pole generating a recording magnetic field in a magnetic recording medium, a return yoke paired with the main magnetic pole, and a spin torque oscillator interposed between the main magnetic pole and the return yoke and including a spin injection layer, an oscillation layer, a nonmagnetic metal layer, and spin assist layer stacked in this order, wherein the nonmagnetic metal layer includes at least one metal selected from the group consisting of Cu, Au, Ag, Al, Pd, Pt, Os, and Ir, and the spin assist layer is a soft magnetic layer whose saturation magnetic flux density (Bs), diamagnetic field coefficient (N) and gap magnetic field (Hg) show a relationship expressed by Bs×N>Hg.

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Patent Owner(s)

  • KABUSHIKI KAISHA TOSHIBA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koui, Katsuhiko Yokohama, JP 124 2856
Oikawa, Soichi Hachioji, JP 81 1294

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