Reference : Specific heat and magnetocaloric effect in Pr0.6Sr0.4−xAgxMnO3 manganites
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Engineering, computing & technology : Electrical & electronics engineering
Engineering, computing & technology : Materials science & engineering
Specific heat and magnetocaloric effect in Pr0.6Sr0.4−xAgxMnO3 manganites
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 mailto [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Yes (verified by ORBi)
[en] Thermal properties ; Magnetocaloric effect ; 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.
Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Wallonie-Bruxelles International - WBI ; Polish Academy of Science ; Fédération Wallonie Bruxelles. Fonds de la Recherche Scientifique - F.R.S.-FNRS
Researchers ; Professionals
© 2018 Elsevier Ltd. All rights reserved.

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