Electrical, magnetic properties and electronic structure of non-stoichiometric DyNi2Mnx compounds
Autor(en): | Marchenkov, V.V. Mushnikov, N.V. Kuznetsova, T.V. Buling, A. Gerasimov, E.G. Gaviko, V.S. Grebennikov, V.I. Fomina, K.A. Weber, H.W. Derks, C. Neumann, M. |
Stichwörter: | Dysprosium compounds; Electronic structure; Low temperature effects; Magnetic properties; Magnetism; Phase structure; Rare earth alloys; Temperature, 3d metals; Laves phase structure; Low temperatures; Mn content; Non-stoichiometric; Ordering temperature; Valence electron, Manganese | Erscheinungsdatum: | 2012 | Herausgeber: | Institute of Physics Publishing | Journal: | Journal of Physics: Conference Series | Volumen: | 400 | Ausgabe: | PART 3 | Zusammenfassung: | The electrical, magnetic properties and electronic structure were studied in DyNi2Mnx (0 ≤ x ≤ 1.25) alloys. It was found that the alloys crystallize in a cubic MgCu2 Laves phase structure, in spite of the R (R = rare-earth element) to 3d-metal ratio changing from 1:2 to 1:3.25. The binary DyNi2 compound is characterized by a low temperature of magnetic ordering, TC = 22 K, since the 3d-band is almost filled by the valence electrons of Dy. The ordering temperature increases very sharply with the addition of Mn, reaches the maximum value of 120 K at x = 0.5 and then slightly decreases. A monotonous decrease of the magnetization is observed with increasing Mn content. The resistivity also varies with increasing x reflecting the changes in the conduction band. The XPS results show an increase of Mn3d states close to the Fermi level. The N(Ef) dependence for DyNi2Mnx strongly depends on f - d interactions and can be connected with the change of TC (x). The good relation between the magnetic, electrical properties and electronic structure has been found. |
Beschreibung: | Conference of 26th International Conference on Low Temperature Physics, LT 2011 ; Conference Date: 10 August 2011 Through 17 August 2011; Conference Code:95480 |
ISSN: | 17426588 | DOI: | 10.1088/1742-6596/400/3/032050 | Externe URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873653915&doi=10.1088%2f1742-6596%2f400%2f3%2f032050&partnerID=40&md5=ab2d438228419a7378156031f4d27e7e |
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geprüft am 23.05.2024