Synthesis Characterization of Magnetotransport Properties in Pr-doped La0.7Pb0.3MnO3 Compounds

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概要

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• Magnetic and magnetoresistive properties of La0.7-xPrxPb0.3MnO3 perovskite polycrystalline have been systematically studied. The substitution of La ions by Pr ions causes the structural change from rhombohedral to orthorhombic and the suppression of ferromagnetism. Ferromagnetic-paramagnetic and metal–insulator transitions are significantly affected by the Pr content $x$. The magnetic order due to Pr doping exhibits an incomplete magnetic saturation and varies from the ferromagnetic long-range order to short-range one. This fact is in good agreement with the decrease of the total exchange integral, corresponding to the increase of the $B$ value in Bloch's $T^{3/2}$ law. Moreover, the decrease of the metal–insulator (MI) transition temperature $T_{\text{P}}$ and the increase of the magnetoresistance ratio with Pr doping are observed. It is suggested that the canted spins of the Mn moments induced by the substitution of Pr ions for La sites play an important role in the magnetic and magnetoresistance effect.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2003-05-15

著者

• Young San

  Department Of Electrical Engineering Hsiuping Institute Of Technology

• Horng Lance

  Department Of Physics National Changhua University Of Education

• Horng Lance

  Department of Physics, National Changhua University of Eduction, Changhua 500, Taiwan

• Kang P.

  Department of Physics, National Changhua University of Education, Changhua 500, Taiwan

• Young San

  Department of Electrical Engineering, Hsiuping Institute of Technology, Taichung 412, Taiwan

関連論文

• Substitution Effect on Magnetization Behaviors in Manganese Perovskites La_Y_xPb_MnO_3 (0.0*x*0.2)
• Evolution of Magnetotransport Properties and Spin-Glass Behavior of the La_Nd_xPb_MnO_3 System : Magnetism
• Effects of Field Cooling Direction on Magnetoresistance of Exchange-Biased Magnetic Tunnel Junction Rings
• Pinning Effects Induced by Periodic Arrays of Structural Corrugations in Nb Thin Films
• Substitution Effect on Magnetization Behaviors in Manganese Perovskites La0.7-xYxPb0.3MnO3 ($0.0\leq x\leq 0.2$)
• Synthesis Characterization of Magnetotransport Properties in Pr-doped La0.7Pb0.3MnO3 Compounds

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