A general approach to synthesis of nanoparticles with controlled morphologies and magnetic properties
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120 (United States)
We present a systematic approach to fabricate a variety of magnetic nanoparticles with desirable structure and controlled magnetic properties based on our studies of the process kinetics. The morphology of binary alloy particles is dependent on their bulk thermodynamics--for immiscible heterogeneous systems (Co-Au) core-shell structures are obtained while miscible systems (Fe-Pt) lead to alloy nanoparticles. The annealing effects on FePt nanoparticles show that the coercivity and magnetic anisotropy increase dramatically after annealing at temperatures above 650 deg. C. Studies of Co-Au core-shell structure show that the core is magnetic, but the Au shell does not significantly affect its magnetic properties.
- OSTI ID:
- 20711648
- Journal Information:
- Journal of Applied Physics, Vol. 97, Issue 10; Conference: 49. annual conference on magnetism and magnetic materials, Jacksonville, FL (United States), 7-11 Nov 2004; Other Information: DOI: 10.1063/1.1853991; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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