期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 76, 期 5, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.76.054707
关键词
spin torque; domain wall; magnetoresistance; threshold current; Berry phase; MRAM
The nonadiabatic correction to spin transfer torque arising from fast-varying spin texture is calculated treating the conductions electron fully quantum mechanically. The torque is nonlocal in space, and is shown to be equivalent to a force (due to momentum transfer) acting on the center of mass of the texture. Another kind of force exists in the adiabatic regime, and it is identified to be of topological origin. These forces are shown to be the counter-reactions of electric transport properties, resistivity and the Hall effect.
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