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Magnetism and Magnetotransport in Sonochemically-Prepared Amorphous Co100– xPtx Nanoalloys

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Abstract:

Amorphous nanoalloys of Co100 xPtx (0 ≤ x ≤ 50) prepared sonochemically exhibit a negative magnetotransport effect, showing a maximum for platinum volume fraction of 10%. The oscillatory peak maxima observed in x = 30 composition for residual resistivity, 0 and Tmin corresponds to the peak minima for the negative MR% in the range of compositions studied. We observe that in weakly exchange coupled amorphous alloys, the local magnetic order at Tmin and the disorder effects observed from 0 become crucial.

Keywords: CO-PT NANOALLOYS; MAGNETISM; MAGNETOTRANSPORT SONOCHEMICAL SYNTHESIS

Document Type: Short Communication

DOI: https://doi.org/10.1166/jnn.2004.099

Publication date: 2004-09-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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