Specific heat and magnetocaloric effect in Pr0.6Sr0.4−xAgxMnO3 manganites

[en] The detailed investigation on the specific heat in manganites of Pr0.6Sr0.4−xAgxMnO3 (x=0.05 and x=0.1) has been reported. The experimental conditions were: the temperature range 1.8–330 K and applied magnetic fields of 0, 1, 2 and 3 T. Specific heat results confirmed two phase transitions, a structural one at Tstr = 43 K for both samples and a paramagnetic–ferromagnetic one near TPM–FM=288 K and 284 K for the x=0.05 and x=0.1 sample, respectively. For the more doped sample the magnetic field causes the shift of the PM–FM transition temperature towards higher temperatures. A thorough analysis of particular contributions to the specific heat was presented. The indirect magnetocaloric effect was deduced for the more doped sample (x=0.1). Under anapplied magnetic field of 3 T magnetic entropy changes and adiabatic temperature exhibits a maximum. The absolute ΔSmax reaches the value of 1.74 J/mol K, resulting in adiabatic cooling of ΔTad=0.95 K. Such result onfirms presented samples as promising candidates for the magnetic cooling technology at room temperature.

Research Center/Unit :

SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège

Disciplines :

Physics
Materials science & engineering
Electrical & electronics engineering

Author, co-author :

Szewczyk, Daria; Institute of Low Temperature and Structure Research, Wroclaw, Poland

Thaljaoui, Rachid; University of Sfax, Tunisia

Mucha, Jan; Institute of Low Temperature and Structure Research, Wroclaw, Poland

Stachowiak, Piotr; Institute of Low Temperature and Structure Research, Wroclaw, Poland

Vanderbemden, Philippe ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques

Language :

English

Title :

Specific heat and magnetocaloric effect in Pr0.6Sr0.4−xAgxMnO3 manganites

Publication date :

2018

Journal title :

Intermetallics

ISSN :

0966-9795

Publisher :

Elsevier, Netherlands

Volume :

102

Pages :

88-93

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://www.sciencedirect.com/science/article/pii/S0966979518305697

Funders :

WBI - Wallonie-Bruxelles International
PAN - Polish Academy of Sciences
F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 14 April 2019

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