A detailed study of the hysteresis in La0.67Ca0.33MnO3

Henrique Neves Bez, Kaspar Kirstein Nielsen, Anders Smith, Christian R. H. Bahl

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Abstract

We report a thorough study of the thermal hysteretic behaviour of a single phase sample of the magnetocaloric material La0.67Ca0.33MnO3. Previous reports in the literature have variously found hysteretic and non-hysteretic behaviour. We show the importance of measuring under carefully defined heating and cooling procedures. Careful analysis of the specific heat, measured at five different temperature ramp rates, and the magnetic entropy change indicates that there is no observable hysteresis, even though the behaviour of both quantities is consistent with a first-order phase transition. We discuss the reasons for this and for the differing results previously found.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume416
Pages (from-to)429-433
ISSN0304-8853
DOIs
Publication statusPublished - 2016

Keywords

  • Magnetocaloric effect
  • Hysteresis
  • Phase transition
  • Manganites

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