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Proceedings Paper

Fe nanomagnets with unusual size-dependent magnetization directions produced by fast laser-induced self-organization
Author(s): H. Krishna; N. Shirato; A. K. Gangopadhyay; R. Kalyanaraman
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Paper Abstract

Laser-induced melting of ultrathin films can lead to self-organized arrays of hemispherical particles. We have applied this procedure to assemble arrays of Fe nanomagnets on SiO2 substrates. Morphological studies showed presence of spatial short range order (SRO) in the array. Magnetic properties were studied at room temperature using zero-field magnetic force microscopy (MFM). The particles upto 55 nm in diameter showed in-plane (≤ 45°), compared to out-of-plane magnetization directions (≥ 45°) for the larger particles. The size-dependent orientation of magnetization for these hemispherical particles, was attributed to the dominating magnetostrictive energy and a size-dependent residual strain.

Paper Details

Date Published: 9 September 2008
PDF: 7 pages
Proc. SPIE 7039, Nanoengineering: Fabrication, Properties, Optics, and Devices V, 703909 (9 September 2008); doi: 10.1117/12.795171
Show Author Affiliations
H. Krishna, Washington Univ. in St. Louis (United States)
N. Shirato, Univ. of Tennessee, Knoxville (United States)
A. K. Gangopadhyay, Washington Univ. in St. Louis (United States)
R. Kalyanaraman, Univ. of Tennessee, Knoxville (United States)


Published in SPIE Proceedings Vol. 7039:
Nanoengineering: Fabrication, Properties, Optics, and Devices V
Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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