(Sr, Mn) TiO3-a magnetoelectrically coupled multiglass
authors Kleemann, W; Shvartsman, VV; Bedanta, S; Borisov, P; Tkach, A; Vilarinho, PM
nationality International
journal JOURNAL OF PHYSICS-CONDENSED MATTER
keywords STRONTIUM-TITANATE CERAMICS; SPIN-GLASSES; ORIENTATIONAL GLASSES; FERROELECTRICITY; SUSCEPTIBILITY; SR1-XCAXTIO3; POLARIZATION; MEMORY
abstract Extending the framework for multiferroic materials, in which long-range electric and magnetic orderings coexist, we present a novel 'multiglass' concept, where two different glassy states occur simultaneously. It applies to Sr0.98Mn0.02TiO3 ceramics, where the Mn2+ dopant ions are at the origin of both polar and spin glasses. Spin freezing is initiated at the dipolar glass temperature, Tg approximate to 38 K. Below Tg, both glass phases are independently verified by memory and rejuvenation effects. Strong biquadratic interaction of the Mn2+ spins with the optic soft mode of the incipient ferroelectric host crystal SrTiO3 explains the high spin glass temperature and comparably strong higher order magnetoelectric coupling between the polar and magnetic degrees of freedom.
publisher IOP PUBLISHING LTD
issn 0953-8984
year published 2008
volume 20
issue 43
digital object identifier (doi) 10.1088/0953-8984/20/43/434216
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000259922600017
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journal analysis (jcr 2019):
journal impact factor 2.707
5 year journal impact factor 2.659
category normalized journal impact factor percentile 55.797
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