Documents disponibles écrits par cet auteur

Effects of Co addition on microstructure and magnetic properties of ferromagnetic CoFeSiB alloy films / B. S. Chun in Acta materialia, Vol. 58 N° 8 (Mai 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 2836–2842 Titre : Effects of Co addition on microstructure and magnetic properties of ferromagnetic CoFeSiB alloy films Type de document : texte imprimé Auteurs : B. S. Chun, Auteur ; S.D. Kim, Auteur ; Y.S. Kim, Auteur Année de publication : 2011 Article en page(s) : pp. 2836–2842 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Amorphous  materials  Magnetic  thin  films  Magnetic  properties  Crystal  structure Résumé : A correlation between composition, microstructure, and magnetic properties of sputter-deposited CoFeSiB alloy films has been studied. Various analytical tools and micromagnetic models were employed to understand the details of microstructural evolution and magnetic reversal processes, respectively. The CoFeSiB alloy film shows significantly different microstructure and magnetic properties depend on the Co concentration. When the Co concentration is below 75 at.%, the alloy has an amorphous phase exhibiting magnetic softness with negative remanence. Meanwhile, beyond 75 at.%, the structure consists of nanocrystals precipitated in the amorphous matrix, which becomes magnetically hard with positive remanence as well as antiferromagnetic exchange coupling. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000091 [article] Effects of Co addition on microstructure and magnetic properties of ferromagnetic CoFeSiB alloy films [texte imprimé] / B. S. Chun, Auteur ; S.D. Kim, Auteur ; Y.S. Kim, Auteur . - 2011 . - pp. 2836–2842. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 2836–2842 Mots-clés : Amorphous  materials  Magnetic  thin  films  Magnetic  properties  Crystal  structure Résumé : A correlation between composition, microstructure, and magnetic properties of sputter-deposited CoFeSiB alloy films has been studied. Various analytical tools and micromagnetic models were employed to understand the details of microstructural evolution and magnetic reversal processes, respectively. The CoFeSiB alloy film shows significantly different microstructure and magnetic properties depend on the Co concentration. When the Co concentration is below 75 at.%, the alloy has an amorphous phase exhibiting magnetic softness with negative remanence. Meanwhile, beyond 75 at.%, the structure consists of nanocrystals precipitated in the amorphous matrix, which becomes magnetically hard with positive remanence as well as antiferromagnetic exchange coupling. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000091