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    Destruction of spin cycloid in (111)(c)-oriented BiFeO3 thin films by epitiaxial constraint: Enhanced polarization and release of latent magnetization

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    Downloads: 1068
    Date
    2005-01-01
    Author
    Bai, Feiming
    Wang, Junling
    Wuttig, Manfred
    Li, Jiefang
    Wang, Naigang
    Pyatakov, Alexander P.
    Zvezdin, Anatoly Konstantinovich
    Cross, L. E.
    Viehland, Dwight D.
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    Abstract
    In BiFeO3 films, it has been found that epitaxial constraint results in the destruction of a space modulated spin structure. For (111)c films, relative to corresponding bulk crystals, it is shown (i) that the induced magnetization is enhanced at low applied fields; (ii) that the polarization is dramatically enhanced; whereas, (iii) the lattice structure for (111)(c) films and crystals is nearly identical. Our results evidence that eptiaxial constraint induces a transition between cycloidal and homogeneous anti ferromagnetic spin states, releasing a latent antiferromagnetic component locked within the cycloid. (C) 2005 American Institute of Physics.
    URI
    http://hdl.handle.net/10919/25247
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    • Scholarly Works, Materials Science and Engineering (MSE) [394]

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