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

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

doi:10.1080/13642810110033818

Low-temperature magnetothermodynamics of Pr_0.7Ca_0.3MnO₃

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

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11 Scopus citations

Abstract

We present a detailed magnetothermal study of Pr_0.7Ca_0.3MnO₃, 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 language	English (US)
Pages (from-to)	417-431
Number of pages	15
Journal	Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume	81
Issue number	4
DOIs	https://doi.org/10.1080/13642810110033818
State	Published - Apr 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Physics and Astronomy(all)

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10.1080/13642810110033818

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title = "Low-temperature magnetothermodynamics of Pr0.7Ca0.3MnO3",

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.",

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T1 - Low-temperature magnetothermodynamics of Pr0.7Ca0.3MnO3

AU - Roy, M.

AU - Mitchell, J. F.

AU - Ramirez, A. P.

AU - Schiffer, P.

PY - 2001/4

Y1 - 2001/4

N2 - 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.

AB - 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.

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ER -

Low-temperature magnetothermodynamics of Pr_0.7Ca_0.3MnO₃

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