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Titolo:
Modulated magnetic properties of hard/soft exchange-coupled SmFe/NiFe multilayers
Autore:
Yan, SS; Du, J; 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:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
fascicolo: 2-3, volume: 231, anno: 2001,
pagine: 241 - 245
SICI:
0304-8853(200106)231:2-3<241:MMPOHE>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
THIN-FILMS; SM-FE; MAGNETOSTRICTION;
Keywords:
coercivity; induced uniaxial anisotropy; multilayers; domain wall unpinning; annealing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
8
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., "Modulated magnetic properties of hard/soft exchange-coupled SmFe/NiFe multilayers", J MAGN MAGN, 231(2-3), 2001, pp. 241-245

Abstract

Very well-defined induced in-plane uniaxial anisotropy, not obtainable in single layer SmFe films, has been observed in Sm40Fe60/Ni80Fe20 multilayers. The easy axis coercivity monotonically decreases as the thickness of NiFe(SmFe) layers increases (decreases). These experimental results are well described theoretically by an extended domain wall unpinning model. The easyaxis coercivity and the hard axis saturation field can be reduced by appropriate annealing procedures. Moreover, for multilayers with well-defined uniaxial anisotropy, a linear relationship between the easy axis coercivity and the hard axis saturation field is found, no matter whether the change incoercivity and saturation field is caused by a change in thickness or by annealing. Finally, the evolution in structure caused by annealing is studied by X-ray diffraction and correlated with changes in the coercivity and saturation field. The ability to tailor the magnetic behavior of such systemsis critical to optimizing the performance of multilayered giant magnetostrictive films. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 26/01/20 alle ore 09:53:12