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Your search keyword '"Tung-Wu Hsieh"' showing total 2 results
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2 results on '"Tung-Wu Hsieh"'

1. Reduced saturation magnetization in cobalt antidot thin films prepared by polyethylene oxide-assisted self-assembly of polystyrene nanospheres

Author

Wei-Li Lee, Hsiang-Hsi Kung, Tung-Wu Hsieh, Chi-Chih Ho, Keng-Hui Lin, and Wen-Tau Juan

Subjects
chemistry.chemical_classification, Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, Drop (liquid), chemistry.chemical_element, Polymer, chemistry.chemical_compound, Nuclear magnetic resonance, chemistry, Ferromagnetism, Volume fraction, Self-assembly, Polystyrene, Thin film, Cobalt
Abstract

We have developed an approach to prepare large array nanostructured thin films using polyethylene oxide assisted self-assembly of polystyrene nanospheres as a template. By tuning the antidot diameter in the cobalt thin films, we found a crossover behavior in the magnetization reversal process. In addition, the effective moment per cobalt atom turns out to drop with growing antidot diameter which effectively increases the surface to bulk volume fraction. Our results suggest a tendency of reduced saturation magnetization in a ferromagnet/normal metal interface, where the mixing of itinerant electrons with ferromagnetic d electrons can give rise to observable effect.

Published
2010
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2. Reduced saturation magnetization in cobalt antidot thin films prepared by polyethylene oxide-assisted self-assembly of polystyrene nanospheres.

Author

Chi-Chih Ho, Tung-Wu Hsieh, Hsiang-Hsi Kung, Wen-Tau Juan, Keng-Hui Lin, and Wei-Li Lee

Subjects
NANOTECHNOLOGY, NANOSTRUCTURED materials, THIN films, POLYETHYLENE oxide, COBALT, MAGNETIZATION, ELECTRONS
Abstract

We have developed an approach to prepare large array nanostructured thin films using polyethylene oxide assisted self-assembly of polystyrene nanospheres as a template. By tuning the antidot diameter in the cobalt thin films, we found a crossover behavior in the magnetization reversal process. In addition, the effective moment per cobalt atom turns out to drop with growing antidot diameter which effectively increases the surface to bulk volume fraction. Our results suggest a tendency of reduced saturation magnetization in a ferromagnet/normal metal interface, where the mixing of itinerant electrons with ferromagnetic d electrons can give rise to observable effect. [ABSTRACT FROM AUTHOR]

Published
2010
Full Text
View/download PDF

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