In Situ Electron Diffraction Investigation of Solid State Synthesis of Co-In2O3 Ferromagnetic Nanocomposite Thin Films
| Autor: | V. G. Myagkov, V. S. Zhigalov, Gennady S. Patrin, Liudmila E. Bykova, Sergey M. Zharkov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nanocomposite 0211 other engineering and technologies General Engineering Thermite 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology Nanoclusters Chemical engineering Electron diffraction Ferromagnetism General Materials Science Grain boundary Thin film 0210 nano-technology 021102 mining & metallurgy |
| Zdroj: | JOM. 72:2139-2145 |
| ISSN: | 1543-1851 1047-4838 |
| DOI: | 10.1007/s11837-019-03919-5 |
| Popis: | In situ electron diffraction was used to study structural transformations during the formation of Co-In2O3 ferromagnetic nanocomposite thin films in a thermite reaction of In/Co3O4 bilayer thin films. Heating was performed from room temperature to 600°C at a rate of 4°C/min, while simultaneously electron diffraction patterns were recorded at a speed of 4 frames/min. This made it possible to determine the initiation, 185°C, and finishing, 550°C, temperatures of the solid-state synthesis, as well as the change in the phase composition during the thermite reaction. The synthesized Co-In2O3 film nanocomposite contained ferromagnetic cobalt nanoclusters surrounded by an In2O3 layer, with an average size of 20 nm, and had a magnetization of 400 emu/cm3 and a coercivity of 50 Oe at room temperature. The estimate of the effective interdiffusion coefficient of the reaction suggests that the main mechanism for the formation of the Co-In2O3 nanocomposite is diffusion along the grain boundaries and dislocations. |
| Databáze: | OpenAIRE |
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