Field dependent specific-heat of rare earth manganites

M. Roy, J. F. Mitchell, S. J. Potashnik, P. Schiffer

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The low-temperature specific heat C(H) of several rare-earth manganites (La0.7Sr0.3MnO3, Nd0.5Sr0.5MnO3, Pr0.5Sr0.5MnO3, La0.67Ca0.33MnO3, La0.5Ca0.5MnO3, La0.45Ca0.55MnO3 and La0.33Ca0.67MnO3) was measured as a function of magnetic field. We observed behavior consistent with thermodynamic expectations, i.e., C(H) decreases with field for ferromagnetic metallic compounds by an amount which is in quantitative agreement with spin-wave theory. We also find that C(H) increases with field in most compounds with a charge-ordered antiferromagnetic ground state. In compounds which show evidence of a coexistence of ferromagnetic metallic and antiferromagnetic charge-ordered states, C(H) displays some unusual non-equilibrium effects presumably associated with the phase-separation of the two states. We also observe a large anomalous low-temperature specific heat at the doping-induced metal-insulator transition (at x = 0.50) in La1-xCaxMnO3.

Original languageEnglish (US)
Pages (from-to)191-197
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Issue number2
StatePublished - Aug 1 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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