کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397314 | 1392330 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and magnetic characterization of soft-magnetic FeCo alloy nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural and magnetic characterization of soft-magnetic FeCo alloy nanoparticles Structural and magnetic characterization of soft-magnetic FeCo alloy nanoparticles](/preview/png/5397314.png)
چکیده انگلیسی
Soft-magnetic FeCo alloy nanoparticles with diameters less than 100ânm are prepared by ball milling. X-ray photoemission spectroscopy (XPS) and X-ray magnetic circular dichroism (XMCD) are used to characterize these particles. While the XPS spectrum from the as-prepared sample clearly shows Co photoemission peaks, no sign of Fe is observed in the same spectrum. However, Fe photoemission peaks appear after 1âh of Ar ion sputtering. A quantitative analysis of the XPS spectra shows an increase of Fe concentration versus sputtering time until the Fe:Co ratio of the bulk alloy is reached. In addition, the narrow scan Fe and Co 2p XPS spectra show that Co is more oxidized than Fe. All these measurements indicate that the nanoparticles have a Co shell and an Fe-rich core. They further demonstrate the usefulness of XPS combined with depth-profiling via sputtering to obtain element- and chemically-sensitive structural information on nanoparticles. XMCD as an element-specific magnetic analysis tool further reveals that Fe and Co are ferromagnetically coupled in these particles. The information obtained is useful for establishing a structure-property relation for the studied material that is expected to have applications as a soft magnetic material at high temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 150, Issue 1, January 2006, Pages 11-14
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 150, Issue 1, January 2006, Pages 11-14
نویسندگان
Xingyu Gao, Swee Ching Tan, A.T. S. Wee, Junhua Wu, Lingbing Kong, Xiaojiang Yu, H.O. Moser,