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Journal of Materials Science

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01-01-2014

Specific heat and magnetocaloric effect of Pr_1−xAg_xMnO₃ manganites

Authors: A. G. Gamzatov, A. M. Aliev, A. B. Batdalov, H. Ahmadvand, H. Salamati, P. Kameli

Published in: Journal of Materials Science | Issue 1/2014

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Abstract

This paper presents experimental results of the specific heat and magnetocaloric effect in Pr_1−xAg_xMnO₃ (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 Pr_0.95Ag_0.05MnO₃ 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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Title: Specific heat and magnetocaloric effect of Pr1−x Ag x MnO3 manganites
Authors: A. G. Gamzatov
A. M. Aliev
A. B. Batdalov
H. Ahmadvand
H. Salamati
P. Kameli
Publication date: 01-01-2014
Publisher: Springer US
Published in: Journal of Materials Science / Issue 1/2014
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-013-7704-z

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