(Sr,Mn)TiO3: a magnetoelectric multiglass

By close analogy with multiferroic materials with coexisting long-range electric and magnetic orders a "multiglass" scenario of two different glassy states is observed in Sr(0.98)Mn(0.02)TiO(3) ceramics. Sr-site substituted Mn2+ ions are at the origin of both a polar and a spin glass with...

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Bibliographic Details
Published in:Physical review letters 2008-10, Vol.101 (16), p.165704-165704
Main Authors: Shvartsman, V V, Bedanta, S, Borisov, P, Kleemann, W, Tkach, A, Vilarinho, P M
Format: Article
Language:English
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Summary:By close analogy with multiferroic materials with coexisting long-range electric and magnetic orders a "multiglass" scenario of two different glassy states is observed in Sr(0.98)Mn(0.02)TiO(3) ceramics. Sr-site substituted Mn2+ ions are at the origin of both a polar and a spin glass with glass temperatures T(g) approximately equal to 38 K and < or =34 K, respectively. The structural freezing triggers that of the spins, and both glassy systems show individual memory effects. Thanks to strong spin-phonon interaction within the incipient ferroelectric host crystal SrTiO3, large higher order magnetoelectric coupling occurs between both glass systems.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.101.165704