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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2017, Volume 105, Issue 11, Pages 664–667
DOI: https://doi.org/10.7868/S0370274X17110029
(Mi jetpl5282)
 

CONDENSED MATTER

Energy spectrum of the low-lying states in Sr$_2$FeSi$_2$O$_7$ and the nature of the magnetoelectric effect

M. V. Eremin

Institute of Physics, Kazan Federal University, Kazan, Russia
References:
Abstract: A mechanism underlying the magnetoelectric effect is discussed. This mechanism is related to the combined action of an odd crystal field, spin-orbit coupling, and the interaction of the orbital angular momentum with an applied magnetic field. The effective operator describing the spin states of Fe$^{2+}$ ions is obtained. Such operator allows one to interpret the terahertz spectroscopy data and to calculate both the electric field effect on the magnetization and the magnetic field effect on the electric polarization of the sample. It is demonstrated that the magnetoelectric effect is enhanced with a decrease in the energy corresponding to the tetragonal distortion of ligand tetrahedra.
Funding agency Grant number
Ministry of Education and Science of the Russian Federation 3.6722.2017/8.9
Received: 13.04.2017
Revised: 21.04.2017
English version:
Journal of Experimental and Theoretical Physics Letters, 2017, Volume 105, Issue 11, Pages 696–699
DOI: https://doi.org/10.1134/S0021364017110078
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: M. V. Eremin, “Energy spectrum of the low-lying states in Sr$_2$FeSi$_2$O$_7$ and the nature of the magnetoelectric effect”, Pis'ma v Zh. Èksper. Teoret. Fiz., 105:11 (2017), 664–667; JETP Letters, 105:11 (2017), 696–699
Citation in format AMSBIB
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\vol 105
\issue 11
\pages 664--667
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\crossref{https://doi.org/10.7868/S0370274X17110029}
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\jour JETP Letters
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