Infrared Absorption of Phase Separated La0.67-xPrxCa0.33MnO3  

作　　者：卢遵铭 孙继荣 李养贤 

机构地区：[1]School of Material Science and Engineering, Hebei Univeisity of Technology, Tianjin 300130 [2]State Key Laboratory for Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080

出　　处：《Chinese Physics Letters》2006年第2期456-459,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos G50225209 and G50271023, the Key Foundation of Education Ministry of China under Grant G02017 and the Natural Science Foundation of Hebei Province under Grant No G503031.

摘　　要：Infrared absorption spectra of La0.67-xPrxCa0.33MnO3 （x= 0, 0.18 and 0.36） are experimentally studied in the temperature range 20 -300K. Absorption peak splitting corresponding to the stretching oscillation of the Mn-O bond, together with a shift of peak position, is observed below the Curie temperature. These features weaken and even disappear as the samples are warmed up to the Curie temperature, which indicates that this anomaly may be a result of phase separation in the compounds.Infrared absorption spectra of La0.67-xPrxCa0.33MnO3 （x= 0, 0.18 and 0.36） are experimentally studied in the temperature range 20 -300K. Absorption peak splitting corresponding to the stretching oscillation of the Mn-O bond, together with a shift of peak position, is observed below the Curie temperature. These features weaken and even disappear as the samples are warmed up to the Curie temperature, which indicates that this anomaly may be a result of phase separation in the compounds.

关 键 词：DOUBLE EXCHANGE LA0.7CA0.3MNO3 CHARGE MAGNETORESISTANCE LA1-XCAXMNO3 LA1-XSRXMNO3 MANGANITES 

分 类 号：O433.4[机械工程—光学工程]