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政大典藏 > College of Science > Graduate Institute of Applied Physics > Periodical Articles > Item 140.119/70510

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Title:	Coercive mechanism and training effect in Fe-Au/Ni-Fe bilayer films
Authors:	李尚凡 Yuan,Fu-Te;Yao,Y. D.;Lee,S. F.;Hsu,J. H.
Contributors:	應物所
Date:	2011-04
Issue Date:	2014-10-09 15:51:43 (UTC+8)
Abstract:	Exchange bias effect in spin glass/ferromagnetic systems has been studied recently. Here, we report the coercive mechanism and training effect in Fe-Au/Ni-Fe films. Experimental results indicate that the coercivity (H c) mainly originates from direct coupling between Fe-Au and Ni-Fe layers at temperatures (T) well below the blocking point (T b). At T near T b, H c comes from spin-flop coupling and defects in the Ni-Fe layer. The findings confirm the validity of our spin structure model. Additionally, irreversible rearrangement of Fe-Au spins from the field cooling state was indicated by the training effect of both Fe-Au/Ni-Fe and Fe-Au powder samples. The results are discussed in detail.
Relation:	Journal of Applied Physics,109(7),07E148
Data Type:	article
DOI link:	http://dx.doi.org/10.1063/1.3562903
DOI:	10.1063/1.3562903
Appears in Collections:	[Graduate Institute of Applied Physics] Periodical Articles

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