Exchange bias phenomena in Ni sub(2-x)Mn sub(1.4+x)Ga sub(0.6)

We have performed an experimental investigation on the magnetic properties of Ni sub(2-x)Mn sub(1.4+x)Ga sub(0.6) alloys that exhibit the L1 sub(0) martensitic structure at room temperature. Exchange bias effects under both zero field cooled and field cooled conditions have been observed in the allo...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 647; pp. 935 - 940
Main Authors Khan, Mahmud, Chapai, Ramakanta
Format Journal Article
LanguageEnglish
Published 25.10.2015
Subjects
Alloys
Bias
Crystal structure
Exchange
Magnetic anomalies
Magnetic permeability
Magnetic properties
Spin glass
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Summary:We have performed an experimental investigation on the magnetic properties of Ni sub(2-x)Mn sub(1.4+x)Ga sub(0.6) alloys that exhibit the L1 sub(0) martensitic structure at room temperature. Exchange bias effects under both zero field cooled and field cooled conditions have been observed in the alloys. The ac susceptibility data show frequency dependence with the low temperature magnetic anomaly shifting to higher temperatures with increasing frequency, suggesting towards a spin glass nature of the ground state. The experimental results are explained in terms of the competing ferromagnetic and antiferromagnetic interactions due to the Mn atoms occupying multiple crystalline sites.
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ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.06.124