Dynamical Magnetoelectric Coupling in Multiferroic BiFeO3

In this study, the magnon excitations in multiferroic BiFeO 3 (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 mul...

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Bibliographic Details
Published inInternational journal of thermophysics Vol. 32; no. 4; pp. 739 - 745
Main Author Bartkowska, J. A.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.04.2011
Subjects
Antiferromagnetism
Bosons
Classical Mechanics
Condensed Matter Physics
Excitation
Fermions
Ferroelectric materials
Industrial Chemistry/Chemical Engineering
Joining
Physical Chemistry
Physics
Physics and Astronomy
Spin waves
Transformations
Magnons
Magnetoelectric coupling
Spiral magnetic ordering
Spin wave
Multiferroics
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Summary:In this study, the magnon excitations in multiferroic BiFeO 3 (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.
Bibliography:ObjectType-Article-1
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ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-011-0920-3