Composition dependence of magnetocaloric effect in Sm1−xSrxMnO3(x=0.3–0.5)
We investigated magnetic and magnetocaloric properties in Sm1−xSrxMnO3(x=0.3–0.5). We report a magnetic field-driven first-order metamagnetic transition in the paramagnetic state in x=0.4 and 0.5 and a second-order transition in x=0.3. The highest magnetic entropy (−ΔSm=1.41 J/mol K for ΔH=5 T at T=...
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Veröffentlicht in: | Applied physics letters 2008-12, Vol.93 (23) |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | We investigated magnetic and magnetocaloric properties in Sm1−xSrxMnO3(x=0.3–0.5). We report a magnetic field-driven first-order metamagnetic transition in the paramagnetic state in x=0.4 and 0.5 and a second-order transition in x=0.3. The highest magnetic entropy (−ΔSm=1.41 J/mol K for ΔH=5 T at T=125 K) that occurs in x=0.4 is associated with the metamagnetic transition resulting from the field-induced growth and coalescence of ferromagnetic nanoclusters pre-existing in the paramagnetic state. Our results suggest that manganites with intrinsic nanoscale phase separation can be exploited for magnetic refrigeration. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.3040698 |