Electronic structure and magnetism in CoNi Heusler compounds
| Autor: | Stanislaw Kaprzyk, Janusz Tobola, J. Pierre, M.A. Kouacou, R. V. Skolozdra |
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| Rok vydání: | 1996 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Magnetic moment Magnetism Electronic structure Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Paramagnetism Electrical resistivity and conductivity Hall effect Vacancy defect Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 159:192-200 |
| ISSN: | 0304-8853 |
| Popis: | The magnetic diagram of the Ti(CoNi)Sn system with the Heusler crystal structure has been studied both experimentally and by the charge and spin self-consistent KKR-CPA method. For the end-point compounds TiCo2Sn, TiNi2Sn, TiCo2-xExSn and TiNiESn, where E denotes a vacancy in the lattice, as well as for the disordered TiCo2 xNixSn, TiCo2-xExSn and TiCo1-xNixESn. we present the series densities of states (DOS), magnetic moments and band curves. The Hall effect, resistivity and susceptibility results for selected disordered alloys are also reported. The obtained KKR-CPA description of electronic and magnetic phenomena in the Ti(CoNi)Sn system correspond well to the ferro-para and metal-semiconductor phase transitions observed in experiments. The analysis of band curvature confirms the Hall effect data. The occurrence of semiconducting and paramagnetic states in the TiCo1-xNixESn series was also detected by KKR-CPA computations. |
| Databáze: | OpenAIRE |
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