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Magnetic and anomalous electronic transport properties of the quaternary Heusler alloys Co2Ti1-xFexGe
Buchepalli Venkateswarlu, P. V. Midhunlal,
Published in Elsevier B.V.
2016
Volume: 407
   
Pages: 142 - 147
Abstract
The half-metallic Heusler alloy Co2TiGe has a ferromagnetic ground state with a low magnetic moment (2 μB). It is free of atomic antisite disorder but has low Curie temperature (~390 K). In contrast the other cobalt based Heusler alloy Co2FeGe has high Curie temperature (~980 K) and high magnetic moment (5.6 μB) while exhibiting antisite disorder and lack of half-metallicity. Hence it is of interest to investigate the magnetic and transport properties of solid solutions of these two materials with contrasting characteristics. We report the structural, magnetic and electronic transport properties of quaternary Co2Ti1-x FexGe (x=0.2, 0.4, 0.6, 0.8) Heusler alloys. The alloys crystallize in L21 structure but with antisite disorder. The magnetization measurements revealed that the alloys were of soft ferromagnetic type with high Curie temperatures. Deviation from Slater-Pauling behavior and drastic change in electronic transport properties with some anomalous features were observed.The complex electronic transport properties have been explained using different scattering mechanisms. © 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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    Astrophysics
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    Binary alloys
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    Curie temperature
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    Ferromagnetic materials
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    Ferromagnetism
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    Ground state
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    Iron alloys
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    Magnetic moments
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    Potassium alloys
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    Titanium alloys
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    Transport properties
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    ELECTRONIC TRANSPORT PROPERTIES
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    Ferromagnetic ground state
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    Half-metallicity
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    Heusler alloys
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    Magnetic and transport properties
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    Magnetization measurements
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    MAGNON SCATTERING
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    Quaternary heusler alloys
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    Cobalt alloys