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Metamagnetism-enhanced magnetocaloric effect in the rare earth intermetallic compound Ho5Ge4
, R. Rajivgandhi
Published in Elsevier B.V.
2016
Volume: 418
   
Pages: 118 - 121
Abstract
Magnetic and magnetocaloric properties of polycrystalline Ho5Ge4 (orthorhombic, Sm5Ge4-type, Space group Pnma, No. 62, oP36) compound have been studied. This compound orders antiferromagnetically at ~24 K (TN). From the magnetization vs field isotherms obtained close to the magnetic transition temperature, magnetocaloric effect (MCE) has been estimated. The isothermal magnetic entropy change (ΔSM) reaches a maximum value of ~−27 J/kg-K at ~30 K for a field change of 140 kOe. A metamagnetic transition is observed in the field dependent magnetization data at temperatures below 20 K, for critical fields above 20 kOe, giving rise to a ferromagnetic order and hence a large MCE. The magnetic moment value at 2.5 K is ~8μB/Ho3+ in 90 kOe field. © 2016 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Magnetism and Magnetic Materials
PublisherData powered by TypesetElsevier B.V.
ISSN03048853
Open AccessNo
Concepts (20)
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    Germanium
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    INTERMETALLICS
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    Isotherms
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    Magnetic moments
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    Magnetic properties
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    Magnetism
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    Magnetization
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    Rare earth alloys
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    RARE EARTH COMPOUNDS
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    Rare earths
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    SOLDERING ALLOYS
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    Ferromagnetic orderings
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    Field-dependent magnetization
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    Isothermal magnetic entropy change
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    Magnetic transition temperature
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    Magnetocaloric effect (mce)
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    Magnetocaloric properties
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    Metamagnetic transitions
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    RARE EARTH INTERMETALLIC COMPOUNDS
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    Magnetocaloric effects