Patent ID: 8089803

Claim:
A magnetic random access memory of a spin transfer process, said magnetic random access memory comprising: a plurality of magnetic memory cells; a current supply unit which selects a target memory cell to which data is written from said plurality of magnetic memory cells, and supplies a write current to said target memory cell; and a control unit which controls a supply of said write current supplied by said current supply unit on a basis of a write data, wherein each of said plurality of magnetic memory cells includes: a magnetic material storage layer which stores the data by using a magnetization state; and at least one spin control layer which supplies spin electrons to said magnetic material storage layer on a basis of a same control principle independently of said write data, on a basis of said write current, wherein said magnetic material storage layer comprises: a first magnetic material layer; and a second magnetic material layer which is antiferromagnetically-coupled with said first magnetic material layer through a non-magnetic conductor layer, wherein said at least one spin control layer comprises: a first spin control layer; and a second spin control layer, wherein said first spin control layer comprises: a first magnetic material pinned layer whose magnetization direction is pinned and which is coupled with said first magnetic material layer through a first non-magnetic material layer, wherein said second spin control layer comprises: a second magnetic material pinned layer whose magnetization direction is pinned and which is coupled with said second magnetic material layer through a second non-magnetic material layer, wherein said magnetization directions of said first magnetic material pinned layer and said second magnetic material pinned layer are approximately coincident, wherein said control unit controls said current supply unit so that said write current is supplied from any one of said first magnetic material pinned layer and said second magnetic material pinned layer to the other one, on the basis of said write data, wherein a resistance value between said first magnetic material pinned layer and said first magnetic material layer is different from a resistance value between said second magnetic material pinned layer and said second magnetic material layer, and wherein the data is rewritten by using both of principles of a spin electron transfer from one pinned layer and a spin electron selection pass through an other pinned layer at one time, said one pinned comprising one of said first and second magnetic material pinned layers, and the other pinned layer comprising an other of said first and second magnetic material pinned layers.