کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9834561 | 1524911 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of underlayers on the soft magnetic properties of Fe-Co-Al-O films
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The soft magnetic properties of Fe-Co-Al-O films deposited by sputtering (Fe70Co30)99(Al2O3)1 on a variety of underlayers have been investigated. A remarkable reduction in coercivity, Hc, was found in Fe-Co-Al-O films sputtered on underlayer materials, such as Au, Ag or Cu, that have a surface-free energy in the region of 1-2Â J/m2. All underlayers induced a BCC-(1Â 1Â 0) preferred grain orientation in the Fe-Co-Al-O films, although this effect was weak for Au, Ag and Cu. When the surface free energy of the underlayer material is higher than 2Â J/m2, as in the case of Hf, Fe-Co-Al-O films can be grown with a well-defined BCC-(1Â 1Â 0) crystallographic texture. The primary effect of varying the underlayer in Fe-Co-Al-O bilayer structures is to change the crystallographic texture of the Fe-Co-Al-O films due to the difference in surface-free energy. Transmission electron microscopy performed on cross-sections revealed the presence of clear columnar grains for all underlayers, with an average size of approximately 50Â nm for Hf, dropping to 5-7Â nm for Au, Ag and Cu. This allows us to explain qualitatively the reduction in Hc using Hoffman's ripple theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 287, February 2005, Pages 387-391
Journal: Journal of Magnetism and Magnetic Materials - Volume 287, February 2005, Pages 387-391
نویسندگان
Naoto Hayashi, Yasuyoshi Miyamoto, Kenji Machida, Takahiko Tamaki,