Magnetic and anomalous electronic transport properties of the quaternary Heusler alloys Co2Ti1−Fe Ge
| Autor: | P.V. Midhunlal, P.D. Babu, B. Venkateswarlu, N. Harish Kumar |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Magnetic moment Alloy Titanium alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetization Ferromagnetism 0103 physical sciences engineering Curie Curie temperature 0210 nano-technology Solid solution |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 407:142-147 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.01.059 |
| Popis: | The half-metallic Heusler alloy Co 2 TiGe has a ferromagnetic ground state with a low magnetic moment (2 μ B ). It is free of atomic antisite disorder but has low Curie temperature (~390 K). In contrast the other cobalt based Heusler alloy Co 2 FeGe has high Curie temperature (~980 K) and high magnetic moment (5.6 μ B ) 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 Co 2 Ti 1− x Fe x Ge ( x =0.2, 0.4, 0.6, 0.8) Heusler alloys. The alloys crystallize in L2 1 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. |
| Databáze: | OpenAIRE |
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