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Titolo:
The surface metal-insulator phase transition of MBE (100) magnetite thin film
Autore:
Soszka, W; Kim-Ngan, NTH; Sitko, D; Jaglo, G; Korecki, J; Handke, B;
Indirizzi:
Pedag Univ, Inst Phys, PL-30084 Krakow, Poland Pedag Univ Krakow Poland PL-30084 iv, Inst Phys, PL-30084 Krakow, Poland Stanislaw Staszic Univ Min & Met, Dept Solid State Phys, Fac Phys & Nucl Techniques, PL-30059 Krakow, Poland Stanislaw Staszic Univ Min & Met Krakow Poland PL-30059 9 Krakow, Poland
Titolo Testata:
VACUUM
fascicolo: 1-2, volume: 63, anno: 2001,
pagine: 349 - 354
SICI:
0042-207X(20010702)63:1-2<349:TSMPTO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ION-SCATTERING; VERWEY TRANSITION; FE3O4;
Keywords:
LEIS; magnetite; LEED epitaxial thin film; metal-insulator phase transition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Soszka, W Pedag Univ, Inst Phys, Ul Podchorazych 2, PL-30084 Krakow, Poland Pedag Univ Ul Podchorazych 2 Krakow Poland PL-30084 kow, Poland
Citazione:
W. Soszka et al., "The surface metal-insulator phase transition of MBE (100) magnetite thin film", VACUUM, 63(1-2), 2001, pp. 349-354

Abstract

The (100) surface of the magnetite thin film has been investigated by low-energy ion scattering in the small-angle geometry and in the temperature range of 85-300 K. Thin film of Fe3O4 was grown on MgO (100) substrate by themolecular beam epitaxy (MBE) and characterized by low-energy electron diffraction, conversion electron Mossbauer spectroscopy and scanning tunneling microscopy. The scattered ion spectra have shown two maxima, in which the intensity of the maximum at low-energy side increases enormously with increasing bombarding energy values. The temperature dependence of scattering ionyield, R+(T), for 5.0, 5.5 and 6.0 keV Ne+ bombardments exhibit two minima, around 110 K and around 125 K, related to the metal-insulator phase transition of this material. The high-temperature minimum was found to disappearat 6.5 keV Ne+ bombardment, indicating the ion velocity dependence of the character of the R+(T) curve, which has been observed previously for the MBE (111) magnetite thin film. This phenomenon has been explained in the framework of the resonant and Auger neutralization. (C) 2001 Elsevier Science Ltd. All Iights reserved.

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Documento generato il 14/07/20 alle ore 07:03:28