TY - JOUR
T1 - Inverse current-induced magnetization switching in magnetic tunnel junctions with Fe4N free layer
AU - Isogami, Shinji
AU - Tsunoda, Masakiyo
AU - Komasaki, Yosuke
AU - Sakuma, Akimasa
AU - Takahasi, Migaku
PY - 2010/10
Y1 - 2010/10
N2 - Current-induced magnetization switching (CIMS) in CoFeB (pinned layer)/MgO/Fe4N (free layer) magnetic tunnel junctions (MTJs) was investigated at room temperature and an inverse CIMS phenomenon was clearly identified. From the current-field magnetic phase diagram, determined from the dependence of the switching field on the bias current, the direction of spin-transfer torque was found to be opposite to that observed in CoFeB/MgO/CoFeB-MTJs. The inverse CIMS observed in this study cannot be explained only by the conventional theory, which states that the direction of the spin-transfer torque is determined by the sign of the spin polarization of the pinned layer.
AB - Current-induced magnetization switching (CIMS) in CoFeB (pinned layer)/MgO/Fe4N (free layer) magnetic tunnel junctions (MTJs) was investigated at room temperature and an inverse CIMS phenomenon was clearly identified. From the current-field magnetic phase diagram, determined from the dependence of the switching field on the bias current, the direction of spin-transfer torque was found to be opposite to that observed in CoFeB/MgO/CoFeB-MTJs. The inverse CIMS observed in this study cannot be explained only by the conventional theory, which states that the direction of the spin-transfer torque is determined by the sign of the spin polarization of the pinned layer.
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U2 - 10.1143/APEX.3.103002
DO - 10.1143/APEX.3.103002
M3 - Article
AN - SCOPUS:78549287464
SN - 1882-0778
VL - 3
JO - Applied Physics Express
JF - Applied Physics Express
IS - 10
M1 - 103002
ER -