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Condensed Matter Seminars

ics Condensed Matter
Thursday, April 12, 2001
4:00 PM
Physics Building, Room 204
Note special time.
Note special room.
Rama Balasubramanian [Host: D. Louca]
James Madison University
"X-ray Diffraction and Spectroscopic Investigations of Nanophased Iron"
Nano-phased iron oxides often found in corrosion coatings have properties that are scientifically interesting and industrially important. Naturally weathered iron oxides have particle size in the nanometer regime. Characterizing these oxides therefore require highly specialized spectroscopic tool to accurately quantify the relative % composition of the oxides usually present in a complex mixture. I will be presenting the use of Mossbauer, Micro-Raman and x-ray diffraction tools to accurately characterize each of the oxides in the mixture. Spectroscopic investigations on the influence of chromium in forming nano-phased goethite suggests that with increasing chromium concentration superparamagnetic behavior is enhanced. Micro-structural properties of mechanically alloyed Fe-Al alloys will be presented.

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