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    題名: Coercive mechanism and training effect in Fe-Au/Ni-Fe bilayer films
    作者: 李尚凡
    Yuan,Fu-Te;Yao,Y. D.;Lee,S. F.;Hsu,J. H.
    貢獻者: 應物所
    日期: 2011-04
    上傳時間: 2014-10-09 15:51:43 (UTC+8)
    摘要: 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.
    關聯: Journal of Applied Physics,109(7),07E148
    資料類型: article
    DOI 連結: http://dx.doi.org/10.1063/1.3562903
    DOI: 10.1063/1.3562903
    顯示於類別:[應用物理研究所 ] 期刊論文

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