Magnetization processes of (La 0.7 Pb 0.3 MnO 3 ) 1-x (SiO 2 ) x composites

S. L. Young, T. C. Wu, L. Horng, C. H. Lin, H. Z. Chen, M. C. Kao, C. R. Ou, N. F. Shih, J. B. Shi

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Abstract

The ceramic composites, (La 0.7Pb 0.3MnO 3) 1-x (SiO 2) x, with diluted magnetic properties are prepared using solid-sate sintering route. Magnetization processes of (La 0.7Pb 0.3MnO 3) 1-x (SiO 2) x composites are explored in this study. Ferromagnetism is gradually attenuated due to the magnetic dilution induced by the increase of SiO 2 content. Clearly, irreversible behavior is observed in the zero-field cooling and the field cooling (ZFC-FC) curves at a low field of 100 Oe. Saturation magnetization decreases as x increases while ferromagnetic transition temperature remains around 346 K for all composites. All the composites exhibit ferromagnetic hysteresis behavior which can be modeled by the law of the approach to saturation in the form M=M S(1-a/H). The term a/H expresses the deviation of magnetization from saturation. The smaller factor a for La 0.7Pb 0.3MnO 3-rich samples results in sharper square curve which should be associated with the long-range spin order of ferromagnetic coupling.

Original languageEnglish
Pages (from-to)953-956
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume23
Issue number6
DOIs
Publication statusPublished - 2010 Aug 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Young, S. L., Wu, T. C., Horng, L., Lin, C. H., Chen, H. Z., Kao, M. C., Ou, C. R., Shih, N. F., & Shi, J. B. (2010). Magnetization processes of (La 0.7 Pb 0.3 MnO 3 ) 1-x (SiO 2 ) x composites. Journal of Superconductivity and Novel Magnetism, 23(6), 953-956. https://doi.org/10.1007/s10948-010-0651-x