Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.165704
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Funding
- European Community [NMP3-CT-2006-032616]
- Deutsche Forschungsgemeinschaft [FP6-5001591, KL306/38-3, SFB 491]
- DAAD via Accoes Integradas Luso-Alemas
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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 Sr0.98Mn0.02TiO3 ceramics. Sr-site substituted Mn2+ ions are at the origin of both a polar and a spin glass with glass temperatures T-g approximate to 38 K and <= 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.
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