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Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics

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    0353332 - FZÚ 2011 RIV FR eng J - Journal Article
    Kuzian, R. O. - Laguta, Valentyn - Daré, A.-M. - Kondakova, I.V. - Maryško, Miroslav - Raymond, L. - Garmash, E.P. - Pavlikov, V.N. - Tkach, A. - Vilarinho, P. M. - Hayn, R.
    Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics.
    EPL. Roč. 92, č. 1 (2010), 17007/1-17007/6. ISSN 0295-5075. E-ISSN 1286-4854
    R&D Projects: GA MŠk(CZ) 1M06002
    Institutional research plan: CEZ:AV0Z10100521
    Keywords : magnetoelectric effect * multiferroics * ferroelectrics
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 2.753, year: 2010

    The paper reports magnetization measurements and magnetic resonance data for SrTiO3 doped by manganese. It was shown that coexistent spin and dipole glass beahviours are strongly affected by the distribution of Mn ions between Sr and Ti sites. Two microscopical magnetoelectric coupling mechanisms, which can be involved in all magnetoelectric systems based on incipient ferroelectrics, were proposed. In the first one, the electric field modifies the spin susceptibility via spin-strain coupling of Mn4+. The second mechanism concerns Mn pairs coupled by the position-dependent exchange interaction.
    Permanent Link: http://hdl.handle.net/11104/0192608

     
     
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