Field dependence of magnetic correlations through the polarization flop transition in multiferroicTbMnO3: Evidence for a magnetic memory effect

Autor:	N. Aliouane, Dimitri N. Argyriou, P. Link, Markus Braden, D. Senff
Rok vydání:	2008
Předmět:	Physics Condensed matter physics Spin wave Flop-transition Magnetoelectric effect Magnetic memory Field dependence Multiferroics Neutron scattering Condensed Matter Physics Polarization (waves) Electronic Optical and Magnetic Materials
Zdroj:	Physical Review B. 77
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.77.174419
Popis:	The field-induced multiferroic transition in TbMnO3 has been studied by neutron scattering. Apart strong hysteresis, the magnetic transition associated with the flop of electronic polarization exhibits a memory effect: after a field sweep, TbMnO3 does not exhibit the same phase as that obtained by zero-field cooling. The strong changes in the magnetic excitations across the transition perfectly agree with a rotation of the cycloidal spiral plane indicating that the inverse Dzyaloshinski-Moriya coupling causes the giant magnetoelectric effect at the field-induced transition. The analysis of the zone-center magnetic excitations identifies the electromagnon of the multiferroic high-field phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0b43b513fd369b1bae2c36748907224 https://doi.org/10.1103/physrevb.77.174419 Zobrazit plný text záznamu