Magnetic properties and electronic structures of RCo2-xSix (R=Gd, Y) compounds

Autor(en): Burzo, E
Tetean, R
Sarkozi, Z
Chioncel, L
Neumann, M
Stichwörter: = Y; BEHAVIOR; Chemistry; Chemistry, Physical; electronic structures; magnetic properties; Materials Science; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; rare earth compounds; SC
Erscheinungsdatum: 2001
Herausgeber: ELSEVIER SCIENCE SA
Journal: JOURNAL OF ALLOYS AND COMPOUNDS
Volumen: 323
Startseite: 490
Seitenende: 493
Zusammenfassung: 
Magnetic measurements and band structure calculations were performed on YCo2-xSix and GdCo2-xSix systems. For the YCo2-xSix exchange enhanced paramagnets the magnetic susceptibilities have maxima and at temperatures T >T* a Curie-Weiss type behavior is evidenced. The effective cobalt moments decrease when silicon content increases. This fact was attributed to p-d hybridization effects as evidenced from band structure calculations. The magnetic behavior of cobalt was analyzed in spin fluctuations model. The saturation moments at 4.2 K in GdCo2-xSix system are in agreement with those obtained from band structure calculations. The effective cobalt moments in GdCo2-xSix compounds are smaller than those determined in YCo2-xSix system. This fact was attributed to partial quenching of spin fluctuations by internal field. (C) 2001 Elsevier Science B.V. All rights reserved.
Beschreibung: 
4th International Conference on F-Elements (ICFE-4), UNIV COMPLUTENSE, MADRID, SPAIN, SEP 17-21, 2000
ISSN: 09258388
DOI: 10.1016/S0925-8388(01)01046-5

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