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  Exchange bias-like effect in TbFeAl induced by atomic disorder

Nair, H. S., & Strydom, A. M. (2016). Exchange bias-like effect in TbFeAl induced by atomic disorder. EPL, 114(3): 37001, pp. 1-5. doi:10.1209/0295-5075/114/37001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-2464-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C496-E
Genre: Journal Article

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Nair, Harikrishnan S.1, Author
Strydom, André M.2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: The exchange bias-like effect observed in the intermetallic compound TbFeAl, which displays a magnetic phase transition at T-c(h) approximate to 198K and a second one at T-c(l) approximate to 154K, is reported. Jump-like features are observed in the isothermal magnetization, M(H), at 2K which disappear above 8 K. The field-cooled magnetization isotherms below 10K show loop shifts that are reminiscent of exchange bias, also supported by the training effect. A significant coercive field, H-c approximate to 1.5T at 2K, is observed in TbFeAl which, after an initial increase, shows a subsequent decrease with temperature. The exchange bias field, H-eb, shows a slight increase and a subsequent leveling off with temperature. It is argued that the inherent crystallographic disorder among Fe and Al and the high magnetocrystalline anisotropy related to Tb3+ lead to the exchange bias effect. TbFeAl has been recently reported to show the magnetocaloric effect and the present discovery of exchange bias makes this compound a multifunctional one. The result obtained on TbFeAl generalizes the observation of exchange bias in crystallographically disordered materials and gives impetus for the search for materials with exchange bias induced by atomic disorder. Copyright (C) EPLA, 2016

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Language(s): eng - English
 Dates: 2016-05-202016-05-20
 Publication Status: Published in print
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Title: EPL
  Other : Europhysics Letters
Source Genre: Journal
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Publ. Info: Bristol : IoPP
Pages: - Volume / Issue: 114 (3) Sequence Number: 37001 Start / End Page: 1 - 5 Identifier: Other: 0295-5075
CoNE: /journals/resource/0295-5075