Abstract
Physical mechanisms of magnetization reversal of multilayer magnetic nanofilms by laser radiation are examined and the experiments on the effect of the magnetic field and nanosecond and picosecond laser pulses on the conductivity of the Tb19Co5Fe76/Pr6O11/Tb22Co5Fe73 and Co80Fe20/Pr6O11/Co30Fe70 tunnel microcontacts are carried out. It is shown that with the help of such laser pulses, magnetization reversal of magnetic nanolayers is possible in a zero external magnetic field under the action of the spin current magnetic field, induced by the photon pressure of laser radiation, or the magnetic field generated by circularly polarized picosecond laser pulses. A relative change in the resistance upon the laser magnetization reversal of one of the nanolayers in the Co80Fe20/Pr6O11/Co30Fe70 microcontacts reaches a value of ΔR/R = 0.06 for T = 300 K and ΔR/R = 0.25 for T = 80 K, in the Tb19Co5Fe76/Pr6O11/Tb22Co5Fe73 microcontacts, ΔR/R = 0.3 for T = 300 K and ΔR/R = 0.7 for T = 80 K.
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Original Russian Text © N.N. Krupa, 2011, published in Zhurnal Tekhnicheskoĭ Fiziki, 2011, Vol. 81, No. 1, pp. 111–120.
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Krupa, N.N. Laser radiation control of the magnetic state of multilayer nanofilms. Tech. Phys. 56, 107–116 (2011). https://doi.org/10.1134/S1063784211010142
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DOI: https://doi.org/10.1134/S1063784211010142