Abstract
In this study, the magnon excitations in multiferroic BiFeO3 (BFO) have been discussed. The studies are based on the spin wave theory and Katsura’s model. The influence of the spin wave excitations on the terahertz absorption is discussed. The antiferromagnetic and ferroelectric interactions in multiferroic BFO were included using an effective fermion Hamiltonian. This Hamiltonian is bosonized and diagonalized, using Holstein–Primakoff and Bogoliubov transformations, respectively. An effective boson Hamiltonian is diagonalized to determine the excitation energy of the spin wave. The results obtained in this study are in qualitative agreement with the experimental data.
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Acknowledgment
This study was financed by the Polish Ministry of Science and Higher Education under project No. N R15 0005 04.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Bartkowska, J.A. Dynamical Magnetoelectric Coupling in Multiferroic BiFeO3 . Int J Thermophys 32, 739–745 (2011). https://doi.org/10.1007/s10765-011-0920-3
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DOI: https://doi.org/10.1007/s10765-011-0920-3