Transitions of the Néel vector in spintronics

摘要: Abstract We study transitions of the Neel vector out a metastable state to more stable one in presence polarized current. The discussion is general although system considered an antiferromagnetic spintronic. current allows as function temperature with effect dissipation that can be varied from positive negative depending on sign This different than usual case where only has type when magnetic field being applied antiferromagnet. Using method path integral, we derive expression for rate vector. A cross-over T 0 between quantum and thermal determined. expressions rates below temperature, at above it are presented. diminishes also presented temperature.