Effect of Ag substitution on structural, magnetic and magnetocaloric properties of Pr0.6Sr0.4– xAgxMnO3 manganites

SEM; XRD; ZFC and FC curves; Cooling; Entropy; Lanthanum compounds; Magnetic fields; Magnetocaloric effects; Manganites; Meteorology; Rietveld refinement; Scanning electron microscopy; Silver; X ray diffraction; Critical exponent; Doped manganites; Relative cooling power; Universal curve; Magnetism

Abstract :

[en] A systematic investigation on the structural, magnetic and magnetocaloric properties of Pr0.6Sr0.4–xAgxMnO3 (x=0.05 and 0.1) manganites was reported. Rietveld refinements of the X-ray diffraction patterns confirmed that all samples were single phase and crystallized in the orthorhombic structure with Pnma space group. Magnetic measurements in a magnetic applied field of 0.01 T revealed that the ferromagnetic-paramagnetic transition temperature TC decreased from about 293 to 290 K with increasing silver content from x=0.05 to 0.1. The reported magnetocaloric entropy change and relative cooling power for both samples were considerably remarkable with a ΔSmax value of 1.9 J/(kg·K) and maximum RCP values of 100 J/kg, under a magnetic field change (Δµ0H) equal to 1.8 T. The analysis of the universal curves gave an evidence of a second order magnetic transition for the studied samples. The magnetic field influence on both the magnetic entropy change and the relative cooling power was also studied and discussed. © 2017 The Chinese Society of Rare Earths

Research center :

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

Disciplines :

Electrical & electronics engineering
Materials science & engineering
Physics

Author, co-author :

Thaljaoui, Rachid; SUPRATECS, Department of Electrical Engineering and Computer Science (B28), University of Liege, Belgium, Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, Poland, Faculty of Physics, Warsaw University of Technology, Koszykowa 75, Warsaw, Poland

Pękała, Marek; Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, Poland

Fagnard, Jean-François ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)

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

Language :

English

Title :

Effect of Ag substitution on structural, magnetic and magnetocaloric properties of Pr0.6Sr0.4– xAgxMnO3 manganites

Publication date :

2017

Journal title :

Journal of Rare Earths

ISSN :

1002-0721

Publisher :

Chinese Society of Rare Earths

Volume :

Issue :

Pages :

875-882

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://www.sciencedirect.com/science/article/pii/S100207211760989X

Funders :

WBI - Wallonie-Bruxelles International [BE]

Available on ORBi :

since 09 May 2019

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