Patent ID: 7633795

Claim:
A write control method for a magnetoresistive random access memory including at least one memory cell, the memory cell including a magnetoresistive effect element as a storage element, the magnetoresistive effect element including a recording layer having an axis of easy magnetization and an axis of hard magnetization and of which magnetization direction is variable, a reference layer of which magnetization direction is invariable, and an insulation layer provided between the recording layer and the reference layer, the write control method comprising: writing a datum into one memory cell, the writing of the datum including, applying a pulsative first magnetic field of a magnitude H 1 substantially parallel to the axis of easy magnetization of the recording layer and a pulsative second magnetic field of a magnitude H 4 substantially parallel to the axis of hard magnetization to the recording layer so as to cause a period of the pulsative first magnetic field and a period of the pulsative second magnetic field to overlap each other, reducing the magnitude H 1 of the pulsative first magnetic field to be a magnitude H 2 which is zero or more and which is less than the magnitude H 1 , increasing the magnitude H 2 of the pulsative first magnetic field to a magnitude H 3 which is more than the magnitude H 2 but equal to or less than the magnitude H 1 , reducing the magnitude H 4 of the pulsative second magnetic field to be zero, and increasing the magnitude of the pulsative second magnetic field from zero to a magnitude H 5 which is equal to the magnitude H 4 so as to cause a period of the pulsative second magnetic field of the magnitude H 5 and a period of the pulsative first magnetic field of the magnitude H 3 to overlap each other.