Hexagonal and Orthorhombic Perovskite Phases of ErMnO_3 and TmMnO_3 from Hydrothermal Systems  

作　　者：ZHU Lin-lin CHEN Yan HUANG Ke-ke ZHANG Gang-hua HU Wei-wei YUAN Hong-ming CHANG Hai-bo FENG Shou-hua 

机构地区：[1]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University Changchun 130012, P. R. China [2]Resource and Environment Department, Jilin Agriculture University, Changchun 130118, P. R. China

出　　处：《Chemical Research in Chinese Universities》2010年第5期707-711,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.20631010 and 20771042)

摘　　要：The powder crystals of RMnO3（R=Er, Tm） with hexagonal and orthorhombic structures were prepared under hydrothermal conditions. The different structural phases of the title compounds were controllably formed from different kinds of precursors at different reaction temperatures. All of the samples were characterized by powder X-ray diffraction, scanning electron microscopy, inductively coupled plasma analysis, and variable temperature magnetic susceptibility. Their structures were refined by Rietveld method from powder X-ray diffraction data. The measurement of magnetic behavior shows antiferromagnetic orderings at Neel temperatures around 80 and 40 K for the hexagonal and orthorhombic phases, respectively.The powder crystals of RMnO3（R=Er, Tm） with hexagonal and orthorhombic structures were prepared under hydrothermal conditions. The different structural phases of the title compounds were controllably formed from different kinds of precursors at different reaction temperatures. All of the samples were characterized by powder X-ray diffraction, scanning electron microscopy, inductively coupled plasma analysis, and variable temperature magnetic susceptibility. Their structures were refined by Rietveld method from powder X-ray diffraction data. The measurement of magnetic behavior shows antiferromagnetic orderings at Neel temperatures around 80 and 40 K for the hexagonal and orthorhombic phases, respectively.

关 键 词：MANGANATE RMnO3 ANTIFERROMAGNETISM Hydrothermal synthesis 

分 类 号：O484.1[理学—固体物理] TQ127.2[理学—物理]