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  Magnetic and transport properties in the Heusler series Ni2-xMn1+xSn affected by chemical disorder

Fichtner, T., Kreiner, G., Chadov, S., Fecher, G. H., Schnelle, W., Hoser, A., et al. (2015). Magnetic and transport properties in the Heusler series Ni2-xMn1+xSn affected by chemical disorder. Intermetallics, 57, 101-112. doi:10.1016/j.intermet.2014.10.012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-93ED-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-616D-9
Genre: Journal Article

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 Creators:
Fichtner, Tina1, Author              
Kreiner, Guido2, Author              
Chadov, Stanislav3, Author              
Fecher, Gerhard H.4, Author              
Schnelle, Walter5, Author              
Hoser, Andreas6, Author
Felser, Claudia7, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Guido Kreiner, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863433              
3Stanislav Chadov, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863440              
4Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
5Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
6External Organizations, ou_persistent22              
7Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Crystal structure, magnetic and transport characteristics of Ni2-x Mn1+x Sn Heusler series have been studied with the emphasis on chemical disorder effects. It is shown that the structure and the disorder character in these series can be predicted by using simple rules. Ni-2 MnSn is a ferromagnetic, congruent melting phase, which crystallizes cubic in the L2(1) structure type. By increasing x, Ni and Mn atoms randomly mix and occupy the heterocubic sites of the regular Heusler structure, and the magnetic structure becomes ferrimagnetic. The total magnetic moment m(sat) decreases linearly in the range 0.2 <= x <= 1, while the Curie temperature T-C increases. At low Mn content (x < 0.2), the unit cell volume shows anomalous behavior, characterized by constant m(sat) and T-C. Electrical resistivity, Seebeck coefficient, and thermal conductivity strongly depend on the amount of disorder, which increases with the Mn content. Results of first-principle calculations based on the coherent potential approximation (CPA) alloy theory for the magnetic and electrical properties are in reasonable agreement with the simple rules and all experimental data. (C) 2014 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2015-01-192015-01-19
 Publication Status: Published in print
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Title: Intermetallics
  Abbreviation : Intermetallics
Source Genre: Journal
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Publ. Info: Barking, Essex, England : Elsevier
Pages: - Volume / Issue: 57 Sequence Number: - Start / End Page: 101 - 112 Identifier: ISSN: 0966-9795
CoNE: /journals/resource/954925582175