Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ

W. Zhong*, W. Chen, Chak Tong AU, Y. W. Du

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

Polycrystalline perovskites La2/3Ba1/3MnO 3-δ with different oxygen deficiency δ(0≤δ≤0.10) have been prepared by a modified sol-gel method and their Curie temperatures and magnetocaloric effect have been studied. A close relationship is confirmed to hold between the Curie temperature and the oxygen stoichiometry. The maximum magnetic entropy change is in the order of 2. 7 J/kgK and peaks at Curie temperature for La2/3Ba 1/3MnO3 upon 10 kOe applied field change. For the samples with oxygen deficiency, a reduction of the maximum magnetic entropy change has been observed.

Original languageEnglish
Pages (from-to)238-243
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume261
Issue number1-2
DOIs
Publication statusPublished - Apr 2003

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

User-Defined Keywords

  • Magnetocaloric effect
  • Oxygen stoichiometry
  • Perovskite manganites
  • Sol-gel synthesis

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