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    題名: The electronic and magnetic properties of La0.85Zr0.15MnO3 deposited on SrTiO3 and MgO substrates
    作者: N. G. Deshpande;C. H. Weng;Y. F. Wang;Y. C. Shao;C. Q. Cheng;D. C. Ling;H. C. Hsueh;C. H. Du;H. M.Tsai;C. W. Pao;H. J. Lin;J. F. Lee;J. W. Chiou;M. H. Tsai;W. F. Pong
    貢獻者: 淡江大學物理學系
    關鍵詞: X-ray absorption near edge structure;Ferromagnetism;Epitaxy;X-ray diffraction;Doping
    日期: 2014-06-19
    上傳時間: 2014-06-23
    出版者: College Park: American Institute of Physics
    摘要: The electronic and magnetic properties of tetravalent-ion-doped La0.85Zr0.15MnO3 (LZMO) thin films that were epitaxially grown on SrTiO3 (STO) and MgO substrates were studied using temperature-dependent x-ray diffraction (XRD), x-ray absorption near-edge structure, x-ray linear dichroism, and x-ray magnetic circular dichroism at the Mn L 3,2- and K-edge. XRD studies reveal that the LZMO thin films have compressive and tensile strains (along the c -axis) on the STO and MgO substrates, respectively. As the temperature is reduced from room temperature to below magnetic transition temperature, the preferentially occupied Mn majority-spin e g orbital changes from the in-plane dx 2 -y 2 to the out-of-plane d 3 z 2 -r 2 orbital for LZMO/STO, and vice versa for LZMO/MgO. Experimental results suggest that the new hopping path that is mediated by the Mn2+ ions triggers a stronger d 3 z 2 -r 2 orbital ordering of Mn3+ ions and enhances the ferromagnetic coupling between the Mn spin moments of t 2g electrons in LZMO/STO, whereas the strong tensile strain stabilizes the dx 2 -y 2 orbital by inducing lattice distortions of the MnO6 octahedra in LZMO/MgO.
    關聯: Journal of Applied Physics 115, 233713(10pages)
    DOI: 10.1063/1.4884230
    顯示於類別:[物理學系暨研究所] 期刊論文


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