Patent ID: 8004883

Claim:
A method of writing to a MRAM memory unit comprising: setting an MRAM memory cell to a zero state level, the MRAM memory cell comprising a recording magnetic layer and a free magnetic layer; passing a read current through the MRAM memory cell to read a zero state voltage across the MRAM memory cell; rotating the free magnetization orientation from a zero state level free magnetization orientation until a first desired state voltage is reached to form a first desired state free magnetization orientation forming a first desired state angle with the zero state level recording magnetization orientation; heating the MRAM memory cell recording magnetic layer to a temperature above a blocking temperature of the recording magnetic layer to rotate the recording magnetization orientation to parallel relation with the first desired state free magnetization orientation forming a first desired state recording magnetization orientation; and cooling the MRAM memory cell to a temperature below the blocking temperature of the recording magnetic layer to set the recording magnetization orientation at the first desired state recording magnetization orientation.