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Titolo:
Heat-induced antiferromagnetic coupling in multilayers with ZnSe spacers
Autore:
Walser, P; Hunziker, M; Speck, T; Landolt, M;
Indirizzi:
ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, Switzerland ETH Zurich Zurich Switzerland CH-8093 s Lab, CH-8093 Zurich, Switzerland
Titolo Testata:
PHYSICAL REVIEW B-CONDENSED MATTER
fascicolo: 6, volume: 60, anno: 1999,
pagine: 4082 - 4086
SICI:
0163-1829(19990801)60:6<4082:HACIMW>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
FE/SI MULTILAYERS; MAGNETORESISTANCE; MBE; SEMICONDUCTOR; SANDWICHES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Walser, P ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, Switzerland ETH Zurich Zurich Switzerland CH-8093 8093 Zurich, Switzerland
Citazione:
P. Walser et al., "Heat-induced antiferromagnetic coupling in multilayers with ZnSe spacers", PHYS REV B, 60(6), 1999, pp. 4082-4086

Abstract

Two ferromagnetic films separated by an amorphous semiconducting spacer are exchange coupled across the spacer layer. The coupling is reversibly temperature dependent with a positive temperature coefficient. As spacer material we use amorphous ZnSe which is a compound semiconductor and find heat-induced antiferromagnetic coupling in striking similarity to amorphous Si andGe. In an Fe/alpha-ZnSe/Fe trilayer with spacer thickness between 18 Angstrom and 22 Angstrom the coupling is antiferromagnetic with a positive temperature coefficient. At slightly larger thicknesses between 22 Angstrom and 25 Angstrom we find a reversible transition from ferromagnetic coupling at low temperatures to antiferromagnetic coupling at higher temperatures upon heating. We discuss the reversibly heat-induced effective exchange couplingin terms of localized defect states in the band gap in the vicinity of theFermi energy. [S0163-1829(99)04230-7].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:32:25