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EPR and SQUID studies on magnetic properties of SiO2-doped Ni–Zn ferrite nanocomposites |
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| Authors: | KH Wu TH Ting GP Wang CC Yang BR McGarvey |
| Affiliation: | aDepartment of Applied Chemistry, Chung Cheng Institute of Technology, No. 190, Sanyuan 1st Street, Dashi Jen, NDU Dashi, Taoyuan 335, Taiwan, ROC bChemical Systems Research Division, Chung Shan Institute of Science and Technology, Taoyuan, Taiwan, ROC cDepartment of Chemistry and Biochemistry, Windsor University, Windsor, Ont. N9B 3P4, Canada |
| Abstract: | Effects of the silica content and temperature on the magnetic properties of Ni0.5Zn0.5Fe2O4/SiO2 nanocomposites have been studied by electron paramagnetic resonance (EPR) and superconducting quantum interference device (SQUID) technique. The content of TEOS in the starting solution affects the interaction between NiZn ferrite and silica, and then determines the particle size and the EPR properties. In addition, the SQUID properties of the composites were sensitive to particle size. It was observed that the saturation magnetization (Ms), remnant magnetization (Mr) and initial susceptibility (χi) decreased with increasing SiO2 content. |
| Keywords: | A Magnetic materials A Nanostructures B Sol–gel chemistry D Electronic paramagnetic resonance (EPR) D Magnetic properties |
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