Electrical and magnetic properties, and FLAPW electronic band structure of magnetostrictive Tb0.27Dy0.73(Fe0.7−xNixCo0.3)2 compounds
| Autor: | J. Chmist, Piotr Guzdek, Paweł Stoch, J. Pszczoła, M. Szklarska-Łukasik |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Magnetic moment Condensed matter physics Phonon Mechanical Engineering Magnetostriction Atmospheric temperature range Condensed Matter Physics Lattice constant Mechanics of Materials Electrical resistivity and conductivity General Materials Science Electrical measurements Electronic band structure |
| Zdroj: | Materials Science and Engineering: B. 193:76-82 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2014.11.013 |
| Popis: | The structural and physical properties of nickel-diluted Tb 0.27 Dy 0.73 ( Fe 0.7 − x Ni x Co 0.3 ) 2 intermetallics were studied by X-ray diffraction, four-probe dc electrical measurements and standard strain gauge method. X-ray analysis shows that all samples crystallize in a cubic Laves structure. The lattice parameter decreases linearly with the nickel content. Electrical resistivity was measured in a temperature range of 15–1100 K. The parameters involved in the dependence of resistivity on temperature and composition were determined. Residual, phonon and magnetic resistivity were separated from the electrical resistivity using both the Matthiessen and Bloch-Gruneisen formulas. The compounds’ Curie temperatures, which decrease nonlinearly with x, were obtained from the magnetic resistivity curves. The maximum values of magnetostriction attained for the Tb 0.27 Dy 0.73 ( Fe 0.6 Ni 0.1 Co 0.3 ) 2 compound exceed about 851 ppm. Electronic 3d-band structure and magnetic moment calculations were performed using the Full-Potential Linearized Augmented Plane Waves method. The distribution function for the densities of 3d-states was used to characterise the transition metal subbands. |
| Databáze: | OpenAIRE |
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