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Magnetic properties of magnetically isolated L10-FePt nanoparticles

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4 Author(s)
Momose, Satoru ; Advanced Magnetic Recording Laboratory, Fujitsu Laboratories Ltd., Kanagawa 243-0197, Japan ; Kodama, Hiroyoshi ; Uzumaki, Takuya ; Tanaka, Atsushi

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This letter reports the results obtained by measuring the temperature dependence of the coercivity of magnetically isolated L10-FePt nanoparticles in agglomeration-free films deposited by using a dispersion stabilizer and a spin-coat technique. These measurements not only give the basic magnetic parameters of the nanoparticles but also provide information about the nanoparticle ordering process. The temperature at which isolated FePt nanoparticles start to order seems to be about 650°C.

Published in:

Applied Physics Letters  (Volume:85 ,  Issue: 10 )