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Titolo:
Magnetization-reversal mechanism of hard/soft exchange-coupled trilayers -art. no. 174415
Autore:
Yan, SS; Liu, WJ; Weston, JL; Zangari, G; Barnard, JA;
Indirizzi:
Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA Univ Alabama Tuscaloosa AL USA 35487 at Technol, Tuscaloosa, AL 35487 USA
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 17, volume: 6317, anno: 2001,
pagine: 4415 -
SICI:
0163-1829(20010501)6317:17<4415:MMOHET>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNIAXIAL ANISOTROPY; ANGULAR-DEPENDENCE; 2-PHASE MAGNETS; THIN-FILMS; COERCIVITY; BEHAVIOR; BILAYERS; WALL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Yan, SS Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA Univ Alabama Tuscaloosa AL USA 35487 ol, Tuscaloosa, AL 35487 USA
Citazione:
S.S. Yan et al., "Magnetization-reversal mechanism of hard/soft exchange-coupled trilayers -art. no. 174415", PHYS REV B, 6317(17), 2001, pp. 4415

Abstract

Ni80Fe20/Sm40Fe60/Ni80Fe20 trilayers with in-plane uniaxial anisotropy induced by an applied magnetic field during deposition were prepared on (100)-Si substrates by de magnetron sputtering. Magnetization hysteresis loops were measured by an alternating-gradient magnetometer for various angles between the external magnetic field and the easy axis. The experimental hysteresis loops were quantitatively described by a theoretical model that combines coherent rotation and domain-wall unpinning. When the external field is along the easy axis, the magnetization reversal is caused by domain-wall unpinning. When the external field is along or near the hard axis, the magnetization reversal is caused by coherent rotation. For other orientations, themagnetization first rotates gradually by coherent rotation and then sharply switches by domain-wall unpinning. The domain-wall angle and the pinning energy at the Sharp switching strongly depend on the angle between the external field and the easy axis. Furthermore, the dependence of the coercivitymeasured in the easy direction on the thickness of Ni80Fe20 layers was theoretically reproduced by an extended model of domain-wall unpinning.

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Documento generato il 19/01/20 alle ore 08:58:55