Temperature dependence of current-induced magnetization switching in spin valves with a ferrimagnetic CoGd free layer.
The temperature dependence of current-induced magnetization switching of ferrimagnetic CoGd free layers in spin valves is explored. At temperatures well above and well below the magnetization compensation temperature (T(MC)) of CoGd, a current flowing from the free layer to the CoFe fixed layer aligns the moments of the two layers parallel, and a current flowing in the opposite direction aligns them antiparallel. However, for intermediate temperatures just above T(MC), the current-induced alignment of the moments is reversed. We attribute this effect to the different compensation temperatures of the net magnetization and angular momentum of CoGd.
Jiang
Xin
X
IBM Almaden Research Center, San Jose, California 95120, USA.
Gao
Li
L
Sun
Jonathan Z
JZ
Parkin
Stuart S P
SS