Magneto-resistive effect element, magnetic head, magnetic head slider, head gimbal assembly and hard disk drive apparatus
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United States of America Patent
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Apr 30, 2013
Grant Date -
Aug 2, 2012
app pub date -
Jan 31, 2011
filing date -
Jan 31, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An MR element includes a stack, being a pillar or trapezoidal stack, including first and second magnetic layers in which a relative angle formed by magnetization directions changes according to an external magnetic field, and a spacer layer that is positioned between the first magnetic layer and the second magnetic layer, and that is provided with a main spacer layer that is composed of gallium oxide, zinc oxide or magnesium oxide as a primary component, wherein, one part of side surfaces of the stack forms a part of an air bearing surface; and a cover layer that covers at least another part of the side surfaces of the stack and that is composed of gallium oxide as a primary component.
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