Coupled magnetic and structural transitions in EuMn2O5 as studied by neutron diffraction and three-dimensional polarization analysis

Authors
Polyakov, V Plakhty, V Bonnet, M Burlet, P Regnault, LP Gavrilov, S Zobkalo, I Smirnov, O
Citation
V. Polyakov et al., Coupled magnetic and structural transitions in EuMn2O5 as studied by neutron diffraction and three-dimensional polarization analysis, PHYSICA B, 297(1-4), 2001, pp. 208-212
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
297
Issue
1-4
Year of publication
2001
Pages
208 - 212
Database
ISI
SICI code
0921-4526(200103)297:1-4<208:CMASTI>2.0.ZU;2-W
Abstract
A number of magnetic and structural phase transitions in EuMn2 O-5 is obser ved below T-N similar or equal to 40K by neutron (1/2(0.03)). A ferroelectr ic transition occurs at T-N with the polar displacements of Mn3+ ions along axis a. Three-dimentional dimensional polarization analysis has shown, tha t magnetic moments lie in a-c plane down to T-1 similar or equal to 22K. Se cond structural transition, mainly due to the polar shifts of the Mn4+ ions along c, is observed at T-1. It is accompanied by a magnetic phase transit ion and by appearance of the b-component of spins. (C) 2001 Elsevier Scienc e B.V. All rights reserved.