Spin-dependent current and magnetization reversal in Tb22Co5Fe73/Pr6O11/Tb19Co5Fe76 nanofilms in laser radiation field

The results of investigation of magnetization reversal dynamics of ferrimagnetic amorphous nanolayers with transverse anisotropy is investigated for Al₂O₃/Tb₂₂Co₅Fe₇₃/Al₂O₃ and Al₂O₃/Tb₂₂Co₅Fe₇₃/Pr₆O₁₁/Tb₁₉Co₅Fe₇₆/Al₂O₃ multilayer films irradiated by laser pulses, as well as the effect of such irradiation on the resistance in a Tb₂₂Co₅Fe₇₃/Pr₆O₁₁/Tb₁₉Co₅Fe₇₆ tunnel microcontact. It is shown that magnetization reversal in magnetic nanolayers in the laser radiation field may occur not only because of heating and the action of the external magnetic field, but also under the action of the magnetic field induced by circularly polarized laser radiation, as well as owing to transfer of magnetic moments by polarized electrons. Laser radiation can be used to control (by changing the resistance by a factor of 1.5–2.0) the conductivity of the Tb₂₂Co₅Fe₇₃/Pr₆O₁₁/Tb₁₉Co₅Fe₇₆ tunnel microresistor. Original Russian Text ? N.N. Krupa, 2009, published in Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2009, Vol. 108, No. 5, pp. 981–992.