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Vol.41, No.7, 432 ~ 439, 2003
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| Title |
| Mossbauer Analysis for the Microstructure and Magnetic States of Fe-Co Nanoparticle Synthesized by Chemical Vapor Condensation |
| 오세진 Oh Sei Jin , 최철진 Choi Chul Jin , 권순주 Kwon Soon Ju , 진상호 Jin Sang Ho , 김병기 Kim Byoung Kee |
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| Abstract |
| Nine nano-sized Fe-Co particle samples synthesized by Chemical Vapor Condensation(CVC) were analyzed using Mo¨ssbauer spectroscopy, XRD, BET and HRTEM. The synthesized nanoparticles consisted of metallic core and oxide shell structures, and their surfaces were covered with a-FeOOH, γ-FeOOH and Fe_(3)O_(4). The increase of cobalt content enhanced magnetic field. However, when the decomposition temperature and the oxygen content in the carrier gas (Ar) increased, the magnetic field of nanoparticles reduced with decreasing the average particle size. with increasing the vacuum pressure, the average particle size and the magnetic field increased. |
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| Key Words |
| Nano-sized Fe-Co particle, Chemical Vapor Condensation, Mossbauer spectroscopy, Average particle size, Magnetic property |
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