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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/54821


    Title: 2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3
    Authors: Chen, C.T.;Wu, H.H.;Lin, B.N.;Hsu, Y.Y.;Ku, H.C.
    教師: 古煥球
    Date: 2003
    Publisher: Elsevier
    Relation: Physica B: Condensed Matter, Elsevier, Volumes 329-333, Part 2, May 2003, Pages 829-830
    Keywords: 2D FM short range fluctuation
    A-type AF order
    Orbital order
    Pre-edge splitting
    Abstract: Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T2D≃150 K above A-type antiferromagnetic (AF) Ne´el temperature TN = 139 K was observed in 100 G low field for orbital-ordered LaMnO3. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered eg electrons and weak c-axis AF coupling. Both T2D and TN are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO 3 at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition. © 2003 Elsevier Science B.V. All rights reserved.
    URI: http://www.elsevier.com/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/54821
    Appears in Collections:[物理系] 期刊論文

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