Patent ID: 7034348

Claim:
A magnetic memory device comprising: a magnetoresistive effect element having a pair of ferromagnetic layers opposed to each other through an intermediate layer to cause an electric current to flow in a direction perpendicular to the intermediate layer surface to obtain a magnetoresistive change; and a word line and a bit line sandwiching said magnetoresistive effect element in the thickness direction, wherein one of said pair of ferromagnetic layers contains an amorphous ferromagnetic material whose crystallization temperature is higher than 623° K and, except for impurities, whose composition is represented by the formula Fe a Co b Ni c B d Si e , where: 5≦a≦45 atomic percent, 35≦b≦85 atomic percent, 0≦c≦35 atomic percent, 10≦d≦30 atomic percent, 0≦e≦20 atomic percent, and a+b+c+d+e+=100 atomic percent.