Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics
authors Kuzian, RO; Laguta, VV; Dare, AM; Kondakova, IV; Marysko, M; Raymond, L; Garmash, EP; Pavlikov, VN; Tkach, A; Vilarinho, PM; Hayn, R
nationality International
journal EPL
keywords ELECTRONIC-STRUCTURE; RESONANCE; STRONTIUM; CERAMICS; SYSTEMS; SRTIO3
abstract We report magnetization measurements and magnetic resonance data for SrTiO3 doped by manganese. We show that the recently reported coexistent spin and dipole glass (multiglass) behaviours are strongly affected by the distribution of Mn ions between the Sr and Ti sites. Motivated by this finding we calculate the magnetic interactions between Mn impurities of different kinds. Both LSDA+U and many-body perturbation theory evidence that magnetic and magnetoelectric interactions are mediated by Mn-B(4+) ions substituting for Ti. We propose two microscopic magnetoelectric coupling mechanisms, which can be involved in all magnetoelectric systems based on incipient ferroelectrics. In the first one, the electric field modifies the spin susceptibility via spin-strain coupling of Mn-B(4+). The second mechanism concerns Mn pairs coupled by the position-dependent exchange interaction. Copyright (C) EPLA, 2010
publisher EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
issn 0295-5075
year published 2010
volume 92
issue 1
digital object identifier (doi) 10.1209/0295-5075/92/17007
web of science category Physics, Multidisciplinary
subject category Physics
unique article identifier WOS:000284469900030
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journal analysis (jcr 2019):
journal impact factor 1.958
5 year journal impact factor 1.798
category normalized journal impact factor percentile 51.176
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