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Chin. Phys., 2003, Vol. 12(7): 789-791    DOI: 10.1088/1009-1963/12/7/016
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Magnetic properties of Nd0.5Pb0.5-xSrxMnO3 materials

Lu Yi, Li Qing-An, Di Nai-Li, Ma Xiao, Kou Zhi-Qi, Luo Zhi, Cheng Zhao-Hua
State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract  The structure and magnetic properties of Nd_{0.5}Pb_{0.5-x}Sr_xMnO_3 (0≤x≤0.4) manganites were systematically investigated. Significant changes in Curie temperature and metal-insulator (MI) transition temperature of the samples were observed. All samples exhibited a transition from paramagnetic semiconducting to ferromagnetic metallic state. Curie temperature T_C and the MI transition temperature T_p increased with increasing Sr content. We attributed these behaviours to the enhancing of both the double exchange mechanism and the Jahn-Teller electron-phonon coupling.
Keywords:  transition temperature T_p      magnetic properties      double exchange interaction      structure      Jahn-Teller distortion      neutron diffraction.  
Received:  26 December 2002      Revised:  08 April 2003      Published:  16 March 2005
PACS:  75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))  
  75.30.Et (Exchange and superexchange interactions)  
  75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))  
  71.30.+h (Metal-insulator transitions and other electronic transitions)  
  71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)  

Cite this article: 

Lu Yi, Li Qing-An, Di Nai-Li, Ma Xiao, Kou Zhi-Qi, Luo Zhi, Cheng Zhao-Hua Magnetic properties of Nd0.5Pb0.5-xSrxMnO3 materials 2003 Chin. Phys. 12 789

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