Magnetism, Electronic Transport and Infrared Absorption Spectra in Perovskite Manganite La0.67-xDyxCa0.33MnO3 (x=0～0.6)
Polycrystalline samples La<,0.67-x>Dy<,x>Ca<,0.33>MnO <,3> (x=0~0.6) were prepared by traditional solid- state reaction method. The magnetization and resistivity of the samples were measured by PPMS (Quantum Design). The infrared absorption spectra (temperature scope: 20~300K, frequency: 400~4400cm<- 1>) were collected by WQF-410 Fourier Transform Spectrophotometer. The substitution of Dy on La sites results in a decrease of the Curie temperature Tc and the magnetization, and also induces cluster-glass behaviors. The resistivity of the compounds is enhanced by Dy doped. Infrared absorption spectra provide the evidence of the variety of Mn-O-Mn bohd length due to the Dy substitution and temperature changing. These results suggest that all of the magnetic coupling between Dy and Mn sublattice and La-Dy average ionic radius contribute to the magnetic and electronic character.
perovskite spin glass infrared absorption rare earths
Cao Xiaoming(曹晓明) Lu Zunming(卢遵铭) Chen Hongjian(陈红建) Li Yangxian(李养贤)
School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China Hebei Tiangong Chemical Machines Manufacture Co. Ltd, Shijiazhuang 051432, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
207-210
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）