The relationship between the microstructure and the magnetic properties of nano-scale magnetic particles in a Cu–Fe–Co ternary alloy
| Autor: | Naoya Wada, Mahoto Takeda, Yoshiharu Azuma, Zenji Hiroi |
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| Rok vydání: | 2010 |
| Předmět: |
Nano-scale magnetic particles
Ostwald ripening HRTEM Materials science Cu-Fe-Co Precipitation (chemistry) Metals and Alloys Nanoparticle Precipitation Coercivity Condensed Matter Physics Microstructure Condensed Matter::Materials Science symbols.namesake Crystallography Chemical engineering Transmission electron microscopy TEM Materials Chemistry symbols Magnetic nanoparticles Physical and Theoretical Chemistry High-resolution transmission electron microscopy Physics::Atmospheric and Oceanic Physics |
| Zdroj: | International Journal of Materials Research. 101:356-360 |
| ISSN: | 2195-8556 1862-5282 |
| DOI: | 10.3139/146.110287 |
| Popis: | The relationship between the microstructures and the properties of nano-scale Fe–Co magnetic particles formed in a copper alloy was investigated. Several structural aspects and physical properties of Fe–Co precipitates were investigated simultaneously using transmission electron microscopy, high resolution transmission electron microscopy, and superconducting quantum interference device magnetometry. The microstructure and magnetic properties of precipitates comprising both Fe and Co atoms evolved with isothermal annealing at 873 K. We found that the evolution of small coherent precipitates obeys the Ostwald ripening law; however, the coarsening rate of the particles increased after coherent particles transformed into incoherent precipitates. The coercive force varied, correlating with the evolution of precipitates. |
| Databáze: | OpenAIRE |
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