Abstract The structure and magnetic properties of Nd0.5Pb0.5-xSrxMnO3 (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 TC and the MI transition temperature Tp 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.
Received: 26 December 2002
Revised: 08 April 2003
Accepted manuscript online:
PACS:
75.30.Kz
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
Cite this article:
Lu Yi (鲁毅), Li Qing-An (李庆安), Di Nai-Li (邸乃力), Ma Xiao (马骁), Kou Zhi-Qi (寇志起), Luo Zhi (罗志), Cheng Zhao-Hua (成昭华) Magnetic properties of Nd0.5Pb0.5-xSrxMnO3 materials 2003 Chinese Physics 12 789
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