Magnetoresistive film
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United States of America Patent
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Apr 15, 1997
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N/A
app pub date -
Aug 3, 1995
filing date -
Aug 4, 1994
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Abstract
A magnetoresistive film includes, arranged in the following order, a substrate, a first ferromagnetic layer, a non-magnetic metal film, and a second ferromagnetic layer which has a coercive force different from that of the first ferromagnetic layer. The magnetoresistive film has an uneven number of inflection point(s) in its magnetization hysteresis curve in the process of magnetization transition from a first saturation magnetization state to a second saturation magnetization state, with a magnetic field change quantity Hb and a magnetic field change quantity Ha being in the following relation: Ha/Hb.ltoreq.1 where Ha and Hb are respectively expressed as Ha=.vertline.H.sub.2 -H.sub.0 .vertline. and Hb=.vertline.H.sub.1 -H.sub.0 .vertline., with H.sub.0, H.sub.1 and H.sub.2 respectively representing the magnetic field at the intermediate inflection point, the magnetic field corresponding to 95% of said first saturation magnetization, and the magnetic field corresponding to 95% of said second saturation magnetization after transition.
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