|
|||||
|
|
Crystal structure and magnetism of the FexNi8-xSi3 materials, 0 ≤ x ≤ 8 |
|
| Institution: | 1. Institute of Crystallography, RWTH Aachen, Jägerstr. 17-19, 52066 Aachen, Germany;2. Jülich Centre for Neutron Science-2/Peter Grünberg Institut-4, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany;3. Heinz Maier-Leibnitz Zentrum (FRM II), Technische Universität München, 85748 Garching, Germany;1. Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, 24210-346, Niterói, RJ, Brazil;2. Brazilian Center for Research in Physics, Rua Dr Xavier Sigaud 150, 22290-180, Rio de Janeiro, RJ, Brazil;1. J-PARC Center, JAEA, Tokai, Ibaraki 319-1195, Japan;2. Neutron R&D Division, CROSS, Tokai, Ibaraki 319-1106, Japan;3. Research Center for Strategic Materials, NIMS, Tsukuba, Ibaraki 305-0047, Japan;4. Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan;1. College of Sciences, Shenyang University of Chemical Technology, Shenyang 110142, China;2. College of Sciences, Northeastern University, Shenyang 110819, China |
| Abstract: | 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. |
| Keywords: | Crystal structure Magnetic properties Magnetocaloric effect Iron nickel silicides |
| 本文献已被 ScienceDirect 等数据库收录！ | |