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    题名: Study of the Phase Transition and Charge Ordering in Single-Crystalline Nd1/2Sr1/2MnO3 using X-ray Scattering
    作者: Du, C.-H.;Ghazi, M. E.;Hatton, P. D.;Collins, S. P.;Murphy, B. M.;Kim, B. G.;Cheong, S-W.
    贡献者: 淡江大學物理學系
    关键词: Curie temperature;ferromagnetic materials;ferromagnetic-paramagnetic transitions;magnetic domains;magnetic hysteresis;neodymium compounds;paramagnetic materials;strontium compounds;X-ray scattering
    日期: 2008-07-01
    上传时间: 2012-02-09 11:34:01 (UTC+8)
    出版者: College Park: American Institute of Physics
    摘要: We report a sequent phase transition using high-resolution synchrotron x-ray scattering in a single crystal Nd1/2Sr1/2MnO3. By measuring the peak profile of Bragg reflections, upon cooling, we observed an increase in the width of the Bragg reflections around the Curie temperature (252 K) corresponding to the transition from a paramagnetic to a ferromagnetic state. Below approximately 200 K, dramatic changes in the width and integrated intensity were observed. Changes continued until the formation of charge ordering with q = (½,0,0) at TCO = 152 K. This charge ordering was observed to be the first order transition with a large hysteresis width of 10 K. This sequent transition is understood by the formation of different magnetic domains at different temperature ranges as that observed by neutron powder diffraction.
    關聯: Journal of Applied Physics 104(12), 023517(4pages)
    DOI: 10.1063/1.2957070
    显示于类别:[物理學系暨研究所] 期刊論文


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