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Titolo:
Determination of the elementary jump of Co in CoGa by quasielastic neutronscattering - art. no. 054303
Autore:
Kaisermayr, M; Combet, J; Ipser, H; Schicketanz, H; Sepiol, B; Vogl, G;
Indirizzi:
Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria Univ Vienna Vienna Austria A-1090 Inst Mat Phys, A-1090 Vienna, Austria Univ Vienna, Inst Anorgan Chem, A-1090 Vienna, Austria Univ Vienna Vienna Austria A-1090 t Anorgan Chem, A-1090 Vienna, Austria Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France Inst Max Von Laue Paul Langevin Grenoble France F-38042 Grenoble, France Hahn Meitner Inst, D-14109 Berlin, Germany Hahn Meitner Inst Berlin Germany D-14109 r Inst, D-14109 Berlin, Germany
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 5, volume: 6305, anno: 2001,
pagine: 4303 -
SICI:
0163-1829(20010201)6305:5<4303:DOTEJO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOSSBAUER-SPECTROSCOPY; INTERMETALLIC PHASES; DIFFUSION; SIMULATION; LATTICE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Kaisermayr, M Univ Vienna, Inst Mat Phys, Waehringer Guertel 18, A-1090 Vienna, Austria Univ Vienna Waehringer Guertel 18 Vienna Austria A-1090 ria
Citazione:
M. Kaisermayr et al., "Determination of the elementary jump of Co in CoGa by quasielastic neutronscattering - art. no. 054303", PHYS REV B, 6305(5), 2001, pp. 4303

Abstract

Quasielastic neutron scattering at the backscattering spectrometer IN16 atthe ILL has been used to determine the elementary jump vector of diffusingCo atoms in the B2 phase of CoGa. Measurements have been performed on Co single crystals with 54 at. % Co and 64 at. % Co. For both compositions a maximum of the quasielastic broadening has been observed near a reciprocal lattice point corresponding to a B2 superlattice reflection. This gives unambiguous evidence of Co diffusion via nearest neighbor jumps. From the residence times on the antistructure sites high defect concentrations are deduced. The correlation of Co diffusion has been found to be surprisingly weak. Adiffusion mechanism is suggested which takes advantage of the high degree of disorder and, therefore, cannot be described in terms of defined cycles.

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Documento generato il 24/09/20 alle ore 01:12:40