Enhanced magnetic properties of cobalt nanoparticles on FeMn films |
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| Authors: | Liying Lu Xiaoguang Xu Wentao Zhang Yong Jiang |
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| Affiliation: | a State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, Chinab Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Monodisperse cobalt nanoparticles are synthesized by the thermal decomposition of Co2(CO)8 in phenyl ether and subsequently deposited on antiferromagnetic (AFM) FeMn films and glass substrates, respectively. Magnetic measurement shows that the as-prepared Co nanoparticles are superparamagnetic and can be transformed into ferromagnetic (FM) through thermal treatment. While keeping monodisperse, the annealed FM Co nanoparticles on AFM FeMn films show a much larger coercivity than the ones on glass substrates due to FM/AFM exchange coupling. Accordingly, we propose a convenient method to enhance magnetic properties of nanoparticles. |
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| Keywords: | Magnetic materials Metals and alloys Nanomaterials FM/AFM exchange interaction |
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