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Titolo:
Magnetic structure of the UCuxSi2-x system
Autore:
Pechev, S; Roisnel, T; Chevalier, B; Darriet, B; Etourneau, J;
Indirizzi:
Univ Bordeaux 1, CNRS UPR 9048, ICMCB, F-33608 Pessac, France Univ Bordeaux 1 Pessac France F-33608 048, ICMCB, F-33608 Pessac, France CEA Saclay, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France CEA Saclay Gif Sur Yvette France F-91191 F-91191 Gif Sur Yvette, France
Titolo Testata:
SOLID STATE SCIENCES
fascicolo: 8, volume: 2, anno: 2000,
pagine: 773 - 780
SICI:
1293-2558(200012)2:8<773:MSOTUS>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRON-DIFFRACTION; BEHAVIOR; CHEMISTRY; SILICIDES; CRYSTAL; UPDSN;
Keywords:
uranium; neutron diffraction; magnetic structure; spin glass behaviour;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Chevalier, B Univ Bordeaux 1, CNRS UPR 9048, ICMCB, Ave Dr A Schweitzer, F-33608 Pessac, France Univ Bordeaux 1 Ave Dr A Schweitzer Pessac France F-33608 ce
Citazione:
S. Pechev et al., "Magnetic structure of the UCuxSi2-x system", SOLID ST SC, 2(8), 2000, pp. 773-780

Abstract

Neutron powder diffraction experiments were performed on selected compositions of the UCuxSi2-x system exhibiting an interesting magnetic phase diagram towards the composition: spin fluctuation behaviour for x < 0.49, ferromagnetism for 0.49 <less than or equal to> x < 0.80, spin glass state for 0.80 < x < 0.92 and finally antiferromagnetism for 0.92 < x < 0.96. At 1.5 K,the compounds UCu0.49Si1.51 (hexagonal AlB2 modification) and UCu0.65Si1.35 show a collinear ferromagnetic structure where the uranium magnetic moments equal to 1.1(1) and 2.5(1)<mu>(B), respectively, are aligned in the basal plane of the [U-6] trigonal prisms. On the contrary, UCu0.96Si1.04 adoptsa non-collinear antiferromagnetic structure similar to that observed for UCuSn. Moreover, the study confirms the absence of long range magnetic orderfor UCu0.90Si1.10. (C) 2000 Editions scientifiques et medicales Elsevier SAS. All rights reserved.

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Documento generato il 03/04/20 alle ore 19:09:23