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Evaluation of Dzyaloshinskii-Moriya interaction in metallic nanoheterostructures: methodology and experiment
Russian version
Telegin A. V. 1, Namsaraev Zh. Zh. 2, Bessonova V. A. 1, Antonov V. A.2, Batalov S. V. 1, Ognev A. V. 2
1M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
2Far Eastern Federal University, Vladivostok, Russia
Email: telegin@imp.uran.ru, namsaraev.zhzh@dvfu.ru, valentina.a.bessonova@mail.ru, antonov.van@dvfu.ru, svbatalov@imp.uran.ru, ognev.av@dvfu.ru
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A theoretical and experimental study of the weak antisymmetric Dzyaloshinskii-Moriya exchange interaction in multilayer metal nanostructures of the heavy metal/ferromagnet type is carried out. To assess the Dzyaloshinskii-Moriya interface interaction, methods for studying the dynamics of magnetic domains in a film, determining the magnitude of the current-induced field from the value of the external magnetic field in the plane of the film, and studying the magnetic domain nucleation field are considered. An experimental comparison of the methods is carried out and it is shown that for the Pt(4)/Co(0.7)/MgO(2 nm) nanostructure, yield similar estimates of the Dzyaloshinskii-Moriya interaction field, but the domain nucleation method is technically easier to implement and places fewer demands on the quality of the samples. This method is recommended for studying the evolution of the Dzyaloshinskii-Moriya interaction energy in thin-film nanostructures along with the widely used contactless method for estimating spin-wave dispersion anomalies. Keywords: Dzyaloshinskii-Moriya interaction, nanostructures, current-induced dynamics, magnetic domains, Kerr microscopy, Spin-Hall effect.
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