Polarization-dependent resonant-x-ray diffraction in charge- and orbital-ordering phase of Nd1/2Sr1/2MnO3

作     者：K. Nakamura T. Arima A. Nakazawa Y. Wakabayashi Y. Murakami 

作者机构：Core Research for Evolutional Science and Technology (CREST) Tsukuba 305-0047 Japan 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：1999年第60卷第4期

页      面：2425-2425页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

摘      要：A study of resonant-x-ray scattering in a charge-ordered perovskite manganese oxide Nd1/2Sr1/2MnO3 was performed. Dipole-resonant superlattice reflections originating from the orderings of the charge and orbital with Qcharge=(0,1,0) and Qorbital=(0,1/2,0) in the Pbnm setting were observed. Sudden change in the intensity of the superlattice scattering at the transition temperature indicated a strong first-order phase transition. Characteristic dependence on the x-ray polarization was observed not only for orbital-order superlattice scattering but also for charge-order scattering. It should be closely related to the orbital-ordering type (d3x2−r2/d3y2−r2) or (dx2−z2/dy2−z2).