Abstract
This paper reports on the results of a theoretical investigation into the magnetic and resonance properties of thin films in the range of the transition from a paramagnetic state to a ferromagnetic state in the case where the magnetic transition is a first-order phase transformation. It is demonstrated that, in an external magnetic field directed perpendicular to the film plane, the formation of a specific domain structure consisting of domains of the coexisting paramagnetic and ferromagnetic phases can appear to be energetically favorable. The parameters of the equilibrium system of stripe phase domains and their dependences on the temperature, the magnetic field, and the characteristics of the material are calculated. The specific features of the magnetic resonance spectra under the conditions of formed stripe phase domains are considered. A relationship is derived for the dependence of the resonance field of the system of ferromagnetic domains on the magnetization and temperature. It is shown that the alternating external field can fulfill an orientation function in the formation of stripe phase domains.
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Original Russian Text © Yu.I. Dzhezherya, A.I. Tovstolytkin, 2008, published in Zhurnal Éksperimental’noĭi Teoreticheskoĭ Fiziki, 2008, Vol. 134, No. 5, pp. 930–939.
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Dzhezherya, Y.I., Tovstolytkin, A.I. Formation of phase domain structures in thin films under conditions of a first-order magnetic phase transition. J. Exp. Theor. Phys. 107, 794–803 (2008). https://doi.org/10.1134/S1063776108110095
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DOI: https://doi.org/10.1134/S1063776108110095