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Critical magnetization and hysteresis of nanogranular films with perpendicular anisotropy

  • Order, Disorder, and Phase Transition in Condensed System
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Abstract

The magnetic-field dependences of the stability boundaries of the nonequilibrium magnetic states that exist in a nanogranular film with perpendicular anisotropy in tilted magnetic fields are theoretically described, and the corresponding critical magnetization is calculated. The field dependences of the critical magnetization of the film are analyzed at various ratios of the anisotropy field of particles to the maximum possible demagnetizing field of the film. In a tilted magnetic field, the magnetization reversal curves, which include hysteresis loops, are shown to consist of segments of the following three types: equilibrium stable magnetization, nonequilibrium stable magnetization, and critical type of magnetization.

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Authors and Affiliations

  1. Institute of Physics, National Academy of Sciences of Ukraine, pr. Nauki 144, Kiev, 03028, Ukraine

    S. M. Ryabchenko & V. M. Kalita

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  1. S. M. Ryabchenko
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  2. V. M. Kalita
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Correspondence to V. M. Kalita.

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Original Russian Text © S.M. Ryabchenko, V.M. Kalita, 2014, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 145, No. 2, pp. 325–339.

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Ryabchenko, S.M., Kalita, V.M. Critical magnetization and hysteresis of nanogranular films with perpendicular anisotropy. J. Exp. Theor. Phys. 118, 284–296 (2014). https://doi.org/10.1134/S1063776114020058

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