Specific heat and magnetocaloric effect of Pr1−x Ag x MnO3 manganites
Source abstract
Abstract
This paper presents experimental results of the specific heat and magnetocaloric effect in Pr1−x Ag x MnO3 (x = 0.05–0.25) manganites. A maximum value of magnetic entropy change for the sample with x = 0.15 was observed in magnetic field of 18 kOe at T C = 125 K and was ΔS max ≈ 2.96 J/kg K. In Pr0.95Ag0.05MnO3 sample, a sign inversion of the magnetocaloric effect was observed at low temperatures (~80 K) in low magnetic fields of 750 Oe. The coexistence of ferromagnetic and canted antiferromagnetic phases with closely spaced critical temperatures was found to force the magnetocaloric effect into abrupt sign inversion.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Shape Memory Alloy Transformations
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