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    Title: Charge ordering and the related structural phase transition in single crystal Bi0.24Ca0.76MnO3
    Authors: Su, Y.;Du, C-H.;Hatton, P. D.;Collins, S. P.;Cheong, S-W.
    Contributors: 淡江大學物理學系
    Date: 1999-05
    Issue Date: 2013-07-09 15:10:18 (UTC+8)
    Publisher: College Park: American Physical Society
    Abstract: A single crystal of ~Bi0.24Ca0.76!MnO3 has been extensively studied using both laboratory and synchrotron radiation x-ray scattering. Using x-ray techniques we can directly observe the formation of charge stripes associated with the low-temperature structural phase transition. Weak satellite peaks with a modulation wave vector q'(0.24, 0.24, 0) were observed below the transition temperature. These are associated with the charge ordering of Mn31 and Mn41 ions into charge ~and spin! stripes within the perovskite structure. Measurements of the temperature dependence of the intensity and width of the charge-ordering satellites over the temperature range 10–240 K were also completed. These demonstrate the first-order nature of the structural phase transition that accompanies the formation of charge and spin ordering. Measurements of the width of the charge-order satellites demonstrate that the correlation length of the charge order is long range at all temperatures, and in all directions, below the structural phase transition.
    Relation: Physical Review B (Condensed Matter and Materials Physics) 59(18), pp.11687-11692
    DOI: 10.1103/PhysRevB.59.11687
    Appears in Collections:[物理學系暨研究所] 期刊論文

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