Crystal structure and magnetism of the Fe x Ni 8-x Si 3 materials, 0 ≤ x ≤ 8
| Autor: | Simone Gallus, Mohammed Ait Haddouch, Anatoliy Senyshyn, Mamuka Chikovani, Jörg Perßon, Jörg Voigt, K. Friese, Andrzej Grzechnik |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Diffraction Phase transition Materials science Magnetism Neutron diffraction 02 engineering and technology General Chemistry Crystal structure Trigonal structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Crystallography Lattice (order) 0103 physical sciences Magnetic refrigeration General Materials Science 0210 nano-technology |
| Zdroj: | Solid State Sciences. 76:57-64 |
| ISSN: | 1293-2558 |
| DOI: | 10.1016/j.solidstatesciences.2017.12.005 |
| Popis: | The crystal structure and magnetic properties of the materials FexNi8-xSi3 with 0 ≤ x ≤ 8 have been investigated to estimate any possible magnetocaloric effect and compare it to that in known magnetocalorics. Two structural ranges could be identified in this system by X-ray and neutron diffraction. The structure of the samples with 0 ≤ x ≤ 4 is related to the trigonal structure of Ni31Si12. Doubled c lattice parameters compared to the one in Ni31Si12 are observed in the samples with x = 2 and x = 3. The average structure of Fe2Ni6Si3 has been determined by X-ray single-crystal diffraction. The compounds with the compositions 5 ≤ x ≤ 8 crystallize in cubic Fe3Si-type structure. Magnetic measurements have shown that the compound Fe3Ni5Si3 displays a phase transition close to room temperature. However, its magnetocaloric effect is much smaller than the one in the promising magnetocaloric materials. |
| Databáze: | OpenAIRE |
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