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Magnetomechanical properties of epoxy-bonded Sm1−xNdxFe1.55 (0 ≤ x ≤ 0.56) pseudo-1-3 magnetostrictive particulate composites |
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| Authors: | Fang Yang Chung Ming LeungSiu Wing Or Wei LiuXiangke Lv Zhidong Zhang |
| Affiliation: | a Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong b Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, PR China |
| Abstract: | Pseudo-1-3 magnetostrictive particulate composites consisting of light rare earth (Sm and Nd)-based magnetostrictive Sm1−xNdxFe1.55 particles with the Nd content x of 0-0.56 and randomly distributed sizes of 10-180 μm embedded and aligned in a passive epoxy matrix are fabricated using the particulate volume fraction of 0.5. The quasistatic magnetomechanical properties of the composites are investigated and the results are compared with their monolithic alloys for various x. The composites exhibit similar qualitative trends in properties with the alloys for all x. The Sm0.92Nd0.08Fe1.55 composite shows a large unsaturated magnetostriction λ of −530 ppm at 500 kA/m and a high piezomagnetic coefficient d33 of −2.0 nm/A at 100 kA/m as a result of the magnetocrystalline anisotropy compensation between Sm3+ and Nd3+ ions in the Sm0.92Nd0.08Fe1.55 alloy. |
| Keywords: | Light rare earths Magnetocrystalline anisotropy Magnetomechanical properties Negative magnetostriction Magnetostrictive composites Sm1&minus xNdxFe1 55 alloys |
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