کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1804335 | 1024647 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and optical properties of a self-organized ferromagnetic Ni/Si-nanocomposite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A mesoscopic composite consisting of porous silicon (PS) and two kinds of Ni precipitations is investigated by FTIR-spectroscopy and SQUID-magnetometry, respectively. The electrochemically produced PS/Ni-composite system consists of wires and non-spherical particles with a diameter around 60Â nm and a one-dimensional extension of a few tens of micrometers, which imposes a significant out of plane magnetic anisotropy. Transmission in the mid-infrared is found near 10% for both, bare PS and the Ni-filled system. The transmission spectra of unprocessed Si and PS are similar, apart from the Si-Hx vibration modes due to the PS template. In the presence of Ni a broad absorbance structure at wavenumbers of 3500Â cmâ1 is found, caused by NiOx or Schottky barrier absorption across the Si/Ni-interface between Ni nanoparticles/wires and the silicon skeleton.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 316, Issue 2, September 2007, Pages 114-117
Journal: Journal of Magnetism and Magnetic Materials - Volume 316, Issue 2, September 2007, Pages 114-117
نویسندگان
K. Rumpf, P. Granitzer, P. Pölt, A. Reichmann, H. Krenn,