Low-temperature magnetothermodynamics of Pr0.7Ca0.3MnO3

M. Roy, J. F. Mitchell, A. P. Ramirez, P. Schiffer

Research output: Contribution to journalArticlepeer-review

Abstract

We present a detailed magnetothermal study of Pr0.7Ca0.3MnO3, a perovskite manganite in which an insulator-metal transition can be driven by magnetic field but also by pressure, visible light, X-rays or high currents. We find that the field-induced transition is associated with a large release of energy which accounts for its strong irreversibility. In the ferromagnetic metallic state, specific heat and magnetization measurements indicate a much smaller spin-wave stiffness than seen in any other ferromagnetic manganite, which we explain in terms of ferromagnetism among the Pr moments. The Pr ferromagnetism also appears to influence the low-temperature thermodynamic phase diagram of this material and the uniquely sensitive metastability of the insulating state.

Original languageEnglish (US)
Pages (from-to)417-431
Number of pages15
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume81
Issue number4
DOIs
StatePublished - Apr 2001

ASJC Scopus subject areas

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

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