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Perpendicular Magnetization in Self-Assembled Films of Citrate-Capped γ-Fe2O3 Nanocrystals on Si(100) Surfaces

John, Thomas P. and Michael, Rajamathi and P. V., Vanitha and Kulkarni, G. U. and Rao, C. N. R. (2005) Perpendicular Magnetization in Self-Assembled Films of Citrate-Capped γ-Fe2O3 Nanocrystals on Si(100) Surfaces. Journal of NANOSCIENCE and NANOTECHNOLOGY, 5 (4). pp. 565-570.

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Abstract

γ-Fe2O3 nanocrystals capped with citrate and octylamine have been chemically prepared. The octylamine-capped nanocrystals exhibit a tendency to form ordered lattices. Films of nanocrystals of varying thickness (454, 720, and 1400 μg/cm2 in the case ofcitrate-capped nanocrystals and 300 μg/cm2 in the case of octylamine-capped nanocrystals) have been prepared on Si(100) substrates by drop casting and have been characterized by X-ray diffraction, scanning electron microscopy, and atomic force microscopy. Magnetic measurementshave been carried out on the films as well as on nanocrystal powders. The films of citrate-capped γ-Fe2O3 nanocrystals exhibit enhanced perpendicular magnetization, with the anisotropy depending on the film thickness.

Item Type:Article
Subjects:Physical Science > Nanomagnetics
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3619
Deposited By:JNCASR
Deposited On:19 Jan 2009 09:42
Last Modified:19 Jan 2009 09:42

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