1. Magnetostrictive properties and microstructure of thermally annealed Sm–Fe thin films
- Author
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Sang U. Lim, Jeon Kim, Chul-Su Kim, Suk W. Hwang, and Chong Seung Yoon
- Subjects
Materials science ,Precipitation (chemistry) ,Annealing (metallurgy) ,Mechanical Engineering ,Metallurgy ,Magnetostriction ,Condensed Matter Physics ,Microstructure ,Grain size ,Electron diffraction ,Mechanics of Materials ,General Materials Science ,Crystallite ,Thin film - Abstract
Polycrystalline Sm–Fe thin films were fabricated by annealing sputter-deposited Sm–Fe thin films. Although the annealing of the as-deposited Sm–Fe film tends to precipitate Fe grains, leading to a non-uniform microstructure and low magnetostriction coefficient, the thermal annealing performed in multiple steps produced a relatively large fraction of SmFe2 with uniform grain size. The Sm–Fe thin film annealed at 400, 500, and 600 °C for 1 h at each step produced the highest magnetostriction coefficient in this study; −57 ppm at an applied field of 2.5 kOe.
- Published
- 2007
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