TY - GEN
T1 - Spin transfer torque in magnetic tunnel junctions with synthetic ferrimagnetic layers
AU - Ichimura, M.
AU - Hamada, T.
AU - Imamura, H.
AU - Takahashi, S.
AU - Maekawa, S.
PY - 2009
Y1 - 2009
N2 - Based on the spin-polarized free-electron model, we derive the spin transfer torque in the magnetic tunnel junctions with the synthetic ferrimagnetic layers by analyzing the spin and charge transports in the ballistic regime. In the realistic junctions, the spin torque exerted on the magnetizations of two ferromagnetic layers in the synthetic ferrimagnetic layer shows the unidirectional rotation. It is suggested that, through the antiferromagnetic interlayer coupling in the synthetic ferrimagnetic layer, this unidirectional rotation induces the cooperative reversal of magnetizations in two ferromagnetic layers, and expected that this cooperative rotation reduces the critical current for the magnetization reversal in the synthetic ferrimagnetic layer.
AB - Based on the spin-polarized free-electron model, we derive the spin transfer torque in the magnetic tunnel junctions with the synthetic ferrimagnetic layers by analyzing the spin and charge transports in the ballistic regime. In the realistic junctions, the spin torque exerted on the magnetizations of two ferromagnetic layers in the synthetic ferrimagnetic layer shows the unidirectional rotation. It is suggested that, through the antiferromagnetic interlayer coupling in the synthetic ferrimagnetic layer, this unidirectional rotation induces the cooperative reversal of magnetizations in two ferromagnetic layers, and expected that this cooperative rotation reduces the critical current for the magnetization reversal in the synthetic ferrimagnetic layer.
KW - Magnetic Tunnel Junction
KW - Spin Transfer Torque
KW - Spintronics
UR - http://www.scopus.com/inward/record.url?scp=84903846014&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84903846014&partnerID=8YFLogxK
U2 - 10.1142/9789814282130_0032
DO - 10.1142/9789814282130_0032
M3 - Conference contribution
AN - SCOPUS:84903846014
SN - 981428212X
SN - 9789814282123
T3 - Proceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008
SP - 146
EP - 149
BT - Proceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008
PB - World Scientific Publishing Co. Pte Ltd
T2 - 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008
Y2 - 25 August 2008 through 28 August 2008
ER -