Incommensurate Structure and Phase Transitions in Epitaxial Multiferroic Films

Autor:	A. F. Popkov, A. K. Zvezdin, S. V. Soloviov, Z. V. Gareeva, N. E. Kulagin
Rok vydání:	2015
Předmět:	Phase transition Materials science Condensed matter physics Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Crystal Magnetic anisotropy Spin wave Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Multiferroics Critical field Spin-½
Zdroj:	Ferroelectrics. 475:1-9
ISSN:	1563-5112 0015-0193
Popis:	We investigate transformations of space modulated structure in BiFeO3 films induced by change of magnetic anisotropy, strain, or temperature and applied magnetic field. We show that critical field of the transition between incommensurate and commensurate structures is lower in films as compared with single crystals. There are two incommensurate phases at H∥[111]: plane and conical cycloidal phases with the second order transition between them. An important feature of this transition is softening of spin wave activation mode localized on spin cycloid. Cycloidal spin wave spectrum contains a countable number of branches, thus BiFeO3 can be considered as a magnonic crystal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb0883377b37d39ba6d86bbb3c32c1f7 https://doi.org/10.1080/00150193.2015.994973 Zobrazit plný text záznamu