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Complex magnetic behavior of the heusler alloy - Cu2Mn0.75Fe0.25Al
Buchepalli Venkateswarlu,
Published in Institute of Electrical and Electronics Engineers Inc.
2014
Volume: 50
   
Issue: 11
Abstract
We investigated the structural and magnetic properties of Cu2Mn1-xFexAl (x =0.25 , 0.5, 0.75) alloys. Among the three compositions, only x =0.25 composition crystallizes in single phase with L 21 structure but its magnetic response indicates a complex magnetic structure. The magnetic isotherms were fitted to modified Langevin equation which indicates the presence of clusters with large magnetic moment. The ac susceptibility studies showed the presence of a superparamagnetic phase in the system over and above ferromagnetic order. To determine the nature of the interactions among the clusters, the variation of freezing temperature (Tf) with applied ac frequency was analyzed using different models (Néel-Arrhenius, Vogel-Fulcher, and critical slowing down model). © 2014 IEEE.
About the journal
JournalData powered by TypesetIEEE Transactions on Magnetics
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN00189464
Open AccessNo
Concepts (19)
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    Alloys
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    Aluminum
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    Crystallography
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    Differential equations
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    Iron compounds
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    Magnetic moments
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    Magnetic susceptibility
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    Manganese
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    Spin glass
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    Superparamagnetism
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    Critical slowing down
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    Ferromagnetic orderings
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    Freezing temperatures
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    Full heusler alloy
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    Half-metallicity
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    Magnetic isotherms
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    Structural and magnetic properties
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    SUPERPARAMAGNETIC PHASE
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    Copper alloys