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Magnetocaloric effect in (La0.7Sr0.3MnO3)1−x–(BaTiO3)x solid solution spin-glass system
Arnab Pal,
Published in Springer New York LLC
2018
Volume: 53
   
Issue: 4
Pages: 2405 - 2412
Abstract
(La0.7Sr0.3MnO3)1−x–(BaTiO3)x solid solution samples (x = 0, 0.03, and 0.08) were synthesized by sol–gel route. Pure La0.7Sr0.3MnO3 has orthorhombic structure with Pbnm space group whereas solid solution samples possess rhombohedral structure with R-3c space group. Temperature-dependent ac susceptibility at different frequencies and memory effect confirmed the spin-glass behavior in these samples. The samples exhibited magnetocaloric coefficient around room temperature. The maximum values of magnetic entropy change observed in our samples are 0.45, 0.86, and 1.07 J Kg−1 K−1 for x = 0.03 and 0.62, 1.23 and 1.56 J Kg−1 K−1 for x = 0.08 compounds at 2, 4, and 5 T applied magnetic fields, respectively. The relative cooling power values for x = 0.03 and 0.08 are 55.9 and 116.5 J Kg−1, respectively, at 5 T. The observed multifunctional properties of the studied system give a new direction to explore the magnetocaloric effect in similar such systems. © 2017, Springer Science+Business Media, LLC.
About the journal
JournalData powered by TypesetJournal of Materials Science
PublisherData powered by TypesetSpringer New York LLC
ISSN00222461
Open AccessNo
Concepts (19)
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    Cooling systems
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    Glass
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    Lanthanum compounds
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    Magnetic susceptibility
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    Magnetocaloric effects
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    Manganese compounds
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    Sols
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    Spin glass
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    Ternary systems
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    Applied magnetic fields
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    Magnetic entropy change
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    Multifunctional properties
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    Orthorhombic structures
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    Relative cooling power
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    Rhombohedral structures
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    Spin-glass behavior
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    Temperature dependent
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    Solid solutions