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Magnetocaloric effect in La0.7−xPrxSr0.3MnO3 manganites: Direct and indirect measurements
•The specific heat in La0.7−xPrxSr0.3MnO3 manganites were investigated.•Direct and indirect measurements magnetocaloric effect for La0.7−xPrxSr0.3MnO3.•The maximum value of the MCE is observed for a sample with x = 0.7 ΔS = −421 J/kg K for H = 18 kOe.•In a wide range of changes in the concentration...
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Published in: | Journal of magnetism and magnetic materials 2019-03, Vol.474, p.477-481 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •The specific heat in La0.7−xPrxSr0.3MnO3 manganites were investigated.•Direct and indirect measurements magnetocaloric effect for La0.7−xPrxSr0.3MnO3.•The maximum value of the MCE is observed for a sample with x = 0.7 ΔS = −421 J/kg K for H = 18 kOe.•In a wide range of changes in the concentration of Pr, the value of the MCE varies little.
The results of investigation of specific heat, and magnetocaloric effect for La0.7−xPrxSr0.3MnO3 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7) manganites in the temperature range of 100–425 K at H = 0 and 18 kOe are presented. The magnetocaloric properties have been investigated by direct and indirect measurement techniques. The value of ΔT ranges from 1.09 K to 1.75 K and ΔS from 1.84 J/kg K to 4.21 J/kg K in a magnetic field of 18 kOe. In a wide range of changes in the concentration of Pr, the value of the MCE varies little, and with increasing Pr concentration, TC decreases. |
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ISSN: | 0304-8853 1873-4766 |
DOI: | 10.1016/j.jmmm.2018.11.017 |