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Titolo:
NMR in magnetite below and around the Verwey transition
Autore:
Novak, P; Stepankova, H; Englich, J; Kohout, J; Brabers, VAM;
Indirizzi:
Acad Sci Czech Republ, Inst Phys, Prague 15253 6, Czech Republic Acad Sci Czech Republ Prague Czech Republic 15253 6 53 6, Czech Republic Charles Univ, Fac Math & Phys, Prague 18040 8, Czech Republic Charles Univ Prague Czech Republic 18040 8 rague 18040 8, Czech Republic Eindhoven Univ Technol, Dept Phys, NL-5600 MB Eindhoven, Netherlands Eindhoven Univ Technol Eindhoven Netherlands NL-5600 MB ven, Netherlands
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 2, volume: 61, anno: 2000,
pagine: 1256 - 1260
SICI:
1098-0121(20000101)61:2<1256:NIMBAA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
FE3O4;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Novak, P Acad Sci Czech Republ, Inst Phys, Cukrovarnicka 10, Prague 15253 6, Czech Republic Acad Sci Czech Republ Cukrovarnicka 10 Prague Czech Republic 15253 6
Citazione:
P. Novak et al., "NMR in magnetite below and around the Verwey transition", PHYS REV B, 61(2), 2000, pp. 1256-1260

Abstract

NMR on Fe-57 nuclei was measured in two single crystals of magnetite between 4.2 and 135 K (temperature of the Verwey transition T-V = 121.5 and 123.9 K). We were able to register all lines detected at 4.2 K also at higher temperatures up to T-V. The spectra are compatible with the space group Cc, which predicts 8 and 16 lines for iron on tetrahedral (A) and octahedral (B) sites, respectively. One of the Fe(A) lines is doubly degenerate for all Te TV, which restricts the possible models of the Fe2+ and Fe3+ ordering onthe B sites. Above T-V no remnant of the low-temperature spectrum was detected. At 4.2 K the NMR spin-spin and spin-lattice relaxation times were determined.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 01:15:00