Infrared Absorption of Phase Separated La0.67-xPrxCa0.33MnO3
LU Zun-Ming1, SUN Ji-Rong2, LI Yang-Xian1
1School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130
2State Key Laboratory for Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
Infrared Absorption of Phase Separated La0.67-xPrxCa0.33MnO3
LU Zun-Ming1;SUN Ji-Rong2;LI Yang-Xian1
1School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130
2State Key Laboratory for Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： 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.
2006, Vol. 23 
