Evolution of magnetotransport properties and spin-glass behaviour of the La0.7-xNdxPb0.3MnO3 system

S. L. Young, H. Z. Chen, Lance Horng, J. B. Shi, Y. C. Chen

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17 Citations (Scopus)

Abstract

The effect of neodymium substitution on the lanthanum site in La0.7-xNdxPb0.3MnO3 perovskite polycrystalline has been systematically studied. The substitution of neodymium for lanthanum causes structure change from rhombohedral to orthorhombic. Ferromagnetism is suppressed as neodymium content increases. The magnetic order changes from a ferromagnetic long-range order with x = 0.0 to a spin-glass nature with x = 0.7. Besides, the ferromagnetic-paramagnetic transition temperature values are lower for the neodymium phases than for the lanthanum ones. Therefore, the introduction of neodymium degrades symmetry of the structure, diminishes the spin-coupling exchange interaction, and results in changes of magnetic properties. This fact is in good agreement with increasing the B value in Bloch's T3/2 law and decreasing the spin-wave stiffness parameter D in quadratic dispersion relation.

Original languageEnglish
Pages (from-to)4878-4882
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number8
Publication statusPublished - 2001 Aug 1

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All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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