Interface interaction and inter-osmosis effect of Fe x (SiO2)1-x nanocomposite materials on magnetic properties |
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| Authors: | Yonghong Xiong Caoshui Xiong Tie Li Yuzhi Li Dexing Wang |
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| Affiliation: | (1) Foundational Physics Center, University of Science and Technology of China, 230026 Hefei, China;(2) Department of Physics, University of Science and Technology of China, 230026 Hefei, China;(3) Structure Research Laboratory, University of Science and Technology of China, 230026 Hefei, China;(4) Department of Basic Courses, Qingdao Institute of Architecture and Engineering, 266033 Qingdao, China |
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| Abstract: | Fe x (SiO2)1-x nanocomposites prepared by using mechanical alloying method were reported. The microstructure character and magnetic properties of Fe x (SiO2)1-x nanocomposite samples with different Fe content and different ball milling time were studied by using X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy, and Faraday magnetic balance in a wide temperature range. The results indicate that the rnicrostructure and magnetic properties are closely related to ball milling time and Fe content. When Fe content is less than 20 wt%, the sample after 80-h ball milling has very complex microstructure. Small α-Fe grains and Fe cluster are implanted in SiO2 matrix. And there are not only isolated α-Fe granular and Fe cluster, but also nanometer scaled sandwich network-like structure. Fe x (SiO2)1-x nanocomposite samples display a rich variety of physical and chemical properties as a result of their unique nanostructure, strong interface interaction and inter-osmosis effect in Fe-SiO2 boundaries, and the grain size effect. |
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| Keywords: | Fe x (SiO2)1-x nanocompite materials mechanical alloying interface interaction inter-osmosis effect microstructure M?ssbauer spectroscopy magnetic properties |
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