Effect of Ag substitution on structural, magnetic and magnetocaloric properties of Pr0.6Sr0.4–xAgxMnO3 manganites
来源期刊：JOURNAL OF RARE EARTHS2017年第9期
论文作者：R.Thaljaoui M.P?ka?a J.-F.Fagnard Ph.Vanderbemden
文章页码：875 - 882
摘 要：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 0.01T 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 △Smax value of 1.9 J/（kg·K）and maximum RCP values of 100 J/kg, under a magnetic field change（?μ0H） equal to 1.8T. 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.
R.Thaljaoui1,2,3，M.P?ka?a2，J.-F.Fagnard2，Ph.Vanderbemden2
1. SUPRATECS, Department of Electrical Engineering and Computer Science (B28), University of Liege2. Department of Chemistry, University of Warsaw3. Faculty of Physics, Warsaw University of Technology
摘 要：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 0.01T 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 △Smax value of 1.9 J/（kg·K）and maximum RCP values of 100 J/kg, under a magnetic field change（?μ0H） equal to 1.8T. 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.
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