Interaction of magnetic and dielectric subsystes in a bismuth nodymic ferrite-granate
Автор: Masyugin A. N., Fisenko O. B., Rybina U. I., Filippson G. Yu.
Журнал: Siberian Aerospace Journal @vestnik-sibsau-en
Рубрика: Technological processes and material science
Статья в выпуске: 1 vol.20, 2019 года.
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Bismuth-substituted ferrite garnets possess magneto-optical (MO) properties and are used as spatial light modulators and indicators. The paper studies the influence of magnetic and electric fields on the structural characteristics of thin epitaxial films of bismuth-neodymium ferrite garnet (Bi: NIG) deposited on glass and gallium gadolinium garnet (GGG) substrates. Dynamic properties of polarization, relaxation in a magnetic and electric field are considered, which is an important task for getting a deep insight into the mechanisms of electromagnetic phenomena in solids. Dependence of the magnetostriction coefficient on the magnetic field and dependence of a relative change in the length of the film on the electric field at different temperatures are obtained. A change in the sign of magnetostriction constants with respect to temperature was found. The electric polarization in a periodically applied electric field of 400 V / cm with a frequency of 10 MHz is determined for various magnetic field orientations of 12 kOe and in the absence of a magnetic field. Anisotropy of polarization in a magnetic field and a functional dependence of the polarization relaxation on time are found. These materials can be used as sensors of the magnetic field in a spacecraft.
Bismuth ferrite films, magneto elastic interaction, electric polarization, relaxation
Короткий адрес: https://sciup.org/148321667
IDR: 148321667 | DOI: 10.31772/2587-6066-2019-20-1-112-118
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