標題: Electronic Structure and Magnetic Anisotropies in Orthorhombic Multiferroic YMnO(3) Thin Films
作者: Hsieh, C. C.
Lin, T. H.
Shih, H. C.
Lin, J-Y
Hsu, C-H
Luo, C. W.
Wu, K. H.
Uen, T. M.
Juang, J. Y.
電子物理學系
Department of Electrophysics
公開日期: 1-一月-2009
摘要: Thermodynamically YMnO(3) (YMO) can only exist with hexagonal structure at ambient conditions. In this study, we demonstrate that the stain between film and substrate can play an important role in forming orthorhombic YMO (o-YMO). o-YMO films with nearly perfect crystallographic orientation alignment were obtained on LaAlO(3)(110) substrates. These films allow us to unambiguously disclose the intrinsic magnetic property and electronic structure anisotropies along different crystallographic orientations. The antiferromagnetic (AFM) phase transition was around 42 K. Moreover, we observed a signature of spin reordering at lower temperatures when the applied field was parallel to the a- or c-axis. On the other hand, only the AFM transition was observed when the field is parallel to the b-axis. By comparing the X-ray absorption spectroscopy (XAS) results to standard manganese oxides, YMnO(3) exhibits the dominant Mn(+3) characteristics as that obtained from the standard Mn(2)O(3) powder. The polarization dependent XAS also revealed anisotropic bonding behavior along each crystalline axis.
URI: http://dx.doi.org/10.1088/1742-6596/150/4/042062
http://hdl.handle.net/11536/13267
ISSN: 1742-6588
DOI: 10.1088/1742-6596/150/4/042062
期刊: 25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM
Volume: 150
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顯示於類別:會議論文