To provide a method of measuring a magnetoresistance effect rate of a magnetoresistive element by which highly accurate measurement value can be obtained.
The method of measuring the magnetoresistance effect rate includes the steps of: determining a magnetization direction of a pinned magnetic layer; determining a magnetization direction of a free magnetic layer; obtaining the maximum resistance value by obtaining a ρH curve by applying an external magnetic field of which the strength is increased gradually from 0 in the direction of an angle being larger than 90° and smaller than 180° for the magnetization direction of the free magnetic layer, also being larger than 90° and smaller than 180° for the magnetization direction of the pinned magnetic layer; obtaining the minimum resistance value by obtaining the ρH curve by applying an external magnetic field of which the strength is increased gradually from 0 in the direction of an angle being larger than 180°and smaller than 270° for the magnetization direction of the free magnetic layer, also being larger than 0° and smaller than 90° for the magnetization direction of the pinned magnetic layer; and calculating magnetoresistance effect rate from the maximum resistance value and the minimum resistance value.
COPYRIGHT: (C)2010,JPO&INPIT
MATSUBARA MASATO
ODAGIRI MITSURU
Horimai Kazuharu
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