Abstract:
The domain structure and magnetization reversal mechanisms are studied in quasi-two-dimensional exchange-biased NiFe/FeMn and NiFe/NiO nanomagnetics, using a complex method of magnetooptical indicator films and acoustic emission. The presence of the axial dispersion of unidirectional anisotropy in grains of the antiferromagnetic layer is shown to determine the statistic distribution and chirality of spin springs near the interface. The acoustic emission signals caused by the excitation of elastic Lamb waves upon the magnetization reversal of NiFe/NiO heterostructure are found. The coercive force of these systems is due to irreversible processes to overcome potential barriers that are induced by the formation of spin springs with different chirality, localized in the antiferromagnetic near the ferromagnetic–antiferromagnetic boundary.
Citation:
V. S. Gornakov, I. V. Shashkov, M. A. Lebyodkin, T. A. Lebyodkina, “Domain structure and magnetization reversal micromechanisms in quasi-two-dimensional exchange-biased nanomagnetics”, Fizika Tverdogo Tela, 60:11 (2018), 2181–2189; Phys. Solid State, 60:11 (2018), 2222–2230
\Bibitem{GorShaLeb18}
\by V.~S.~Gornakov, I.~V.~Shashkov, M.~A.~Lebyodkin, T.~A.~Lebyodkina
\paper Domain structure and magnetization reversal micromechanisms in quasi-two-dimensional exchange-biased nanomagnetics
\jour Fizika Tverdogo Tela
\yr 2018
\vol 60
\issue 11
\pages 2181--2189
\mathnet{http://mi.mathnet.ru/ftt9014}
\crossref{https://doi.org/10.21883/FTT.2018.11.46661.19NN}
\elib{https://elibrary.ru/item.asp?id=36903767}
\transl
\jour Phys. Solid State
\yr 2018
\vol 60
\issue 11
\pages 2222--2230
\crossref{https://doi.org/10.1134/S1063783418110082}
Linking options:
https://www.mathnet.ru/eng/ftt9014
https://www.mathnet.ru/eng/ftt/v60/i11/p2181
This publication is cited in the following 2 articles:
Christina Gritsenko, Vladimir Lepalovskij, Mikhail Volochaev, Vladimir Komanický, Aleksandr Gorkovenko, Hanna Pazniak, Maria Gazda, Nikolai Andreev, Valeria Rodionova, “Complex Study of Magnetization Reversal Mechanisms of FeNi/FeMn Bilayers Depending on Growth Conditions”, Nanomaterials, 12:7 (2022), 1178
O. V. Koplak, V. S. Gornakov, Yu. P. Kabanov, E. I. Kunitsyna, I. V. Shashkov, “Temperature dependence of the exchange anisotropy of a GdFeCo ferrimagnetic film coupled to the IrMn antiferromagnet”, JETP Letters, 109:11 (2019), 722–728