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題名: Effect of the Substitutions of Ni3+, Co3+ and Fe3+ for Mn3+ on the Ferromagnetic States of the La0.7Pb0.3MnO3 Manganite
作者: Young, S. L.;Chen, Y. C.;Chen, H. Z.;Horng, Lance;Hsueh, J. F.
貢獻者: 物理學系
日期: 2002-05
上傳時間: 2013-02-05T02:18:13Z
出版者: American Institute of Physics
摘要: The substitution at the Mn site of various transitional metal elements dramatically modifies the magnetic and electronic properties of the La0.7Pb0.3Mn0.8Me0.2O3 (Me=Ni, Co, and Fe) manganites. The powder x-ray diffraction pattern shows a single-phase rhombohedral distorted perovskite structure with space group Rc (No. 167) for all samples. The present article is focused on the effects induced by the partial substitution of Ni, Co, and Fe for the Mn site. The field cooled–zero field cooled curves indicate that the magnetic order is modified from a ferromagnetic long-range spin order for La0.7Pb0.3MnO3 to a spin cluster induced short-range spin order for all the doped compositions. The saturation magnetization, transition temperature, and resistance peak temperature decrease significantly from Ni-doped, Co-doped, to Fe-doped composition. In conclusion, the variation of the magnetic and electronic behaviors is due to the dissimilar 3d electron configuration of the substitutions.
關聯: J. Appl. Phys., 91(10): 8915-8917
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