Magnetic and electric characteristics and abnormality of low-temperature resistivity in La0.67–xErxSr0.33MnO3（0.00≤x≤0.20） system
来源期刊：Journal of Rare Earths2009年第5期
论文作者：刘宁 严国清 张明玉
文章页码：834 - 838
摘 要：M-T curves, ρ-T curves, and MR-T curves of La0.67-xErxSr0.33MnO3 （x=0.00, 0.10, 0.20） system were studied by experiments. The experiments showed that: with increasing the doping amount, the magnetic structure of the system transformed from long-range ferromagnetic ordering to spin-cluster glass state, and M-T curves bent up in the extremely low temperature range; the resistivity of the system increased with increasing doping amount and exhibited the minimum phenomenon of low-temperature resistivity. The variation of the magnetic and electric properties came from the extra magnetic coupling induced by the doping and from the Kondo effect induced by the lattice distortion and local magnetic moments which was similar to that induced by the scattering of magnetic impurities on electron spins.
刘宁1,2，严国清1,3，张明玉1
1. Anhui Key Laboratory of Spin Electron and Nanomaterials,Suzhou College2. College of Science,Anhui Science and Technology University3. National Laboratory of Solid State Microstructures,Physics Department,Nanjing University
摘 要：M-T curves, ρ-T curves, and MR-T curves of La0.67-xErxSr0.33MnO3 （x=0.00, 0.10, 0.20） system were studied by experiments. The experiments showed that: with increasing the doping amount, the magnetic structure of the system transformed from long-range ferromagnetic ordering to spin-cluster glass state, and M-T curves bent up in the extremely low temperature range; the resistivity of the system increased with increasing doping amount and exhibited the minimum phenomenon of low-temperature resistivity. The variation of the magnetic and electric properties came from the extra magnetic coupling induced by the doping and from the Kondo effect induced by the lattice distortion and local magnetic moments which was similar to that induced by the scattering of magnetic impurities on electron spins.
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