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Generation of Nonequilibrium Nuclei of Magnetization in a Rapidly Increasing Magnetic Field in Pt/Co/Ir/Co/Pt Synthetic Ferrimagnets

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Abstract

In a Pt/Co/Ir/Co/Pt synthetic ferrimagnet with perpendicular magnetic anisotropy, a stochastically appearing magnetization peak was found in the field dependence of the magnetic moment at a high sweep rate of the magnetic field of 16 kOe/s and T = 300 K. The peak appears near coinciding switching fields between three equilibrium states of magnetization. The peak is caused by the nucleation of nonequilibrium magnetic domains near structural defects of the cobalt film, where the activation energy of magnetic nucleation decreases.

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Funding

This work was supported by the Program of the President of the Russian Federation for the state support of leading scientific schools of the Russian Federation, project no. NSh-2644.2020.2. The work was performed within the framework of the state assignment of the Institute of Problems of Chemical Physics, Russian Academy of Sciences, project no. AAAA-A19-119092390079-8.

A.I. Bezverkhnii is supported by a grant from the Russian Foundation for Basic Research, project no. 19-32-90128.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    R. B. Morgunov & A. I. Bezverkhnii

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  1. R. B. Morgunov
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  2. A. I. Bezverkhnii
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Correspondence to R. B. Morgunov.

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Translated by O. Zhukova

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Morgunov, R.B., Bezverkhnii, A.I. Generation of Nonequilibrium Nuclei of Magnetization in a Rapidly Increasing Magnetic Field in Pt/Co/Ir/Co/Pt Synthetic Ferrimagnets. Phys. Solid State 62, 2070–2076 (2020). https://doi.org/10.1134/S1063783420110219

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