Abstract
Surface-protected, air-stable nanoparticles of CoPt and CoPt3 were prepared by thermal decomposition/reduction of organometallic precursors with a long-chain aliphatic diol, also known as the polyol process. Particles 3 nm in diameter showed ferromagnetic behavior up to 350 K (Hc = 65 Oe at T = 300 K; Hc = 410 Oe at T = 5K) and underwent a disordering-ordering phase transformation after annealing that resulted in an increase in coercivity (Hc = 170 Oe at T = 300 K; Hc = 2000 Oe at T = 5 K).
Publication types
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Comparative Study
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Evaluation Study
MeSH terms
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Alloys / chemical synthesis
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Alloys / chemistry*
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Alloys / isolation & purification
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Crystallization / methods*
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Hot Temperature*
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Magnetics*
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Materials Testing / methods
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Microspheres
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Molecular Conformation
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Nanotechnology / instrumentation
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Nanotechnology / methods*
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Particle Size
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Powders
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Solutions / chemistry
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Surface Properties
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Temperature
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Wettability
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X-Ray Diffraction
Substances
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Alloys
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Powders
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Solutions
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cobalt platinum alloy