Synthesis of submicron sized Fe20 Ni80 particles and their magnetic properties

Daisuke Kodama, Kozo Shinoda, Ryo Kasuya, Kazuyuki Tohji, Masaaki Doi, Jeyadevan Balachandran

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24 Citations (Scopus)

Abstract

Fe-Ni alloy nanoparticles were synthesized by polyol process using hydrazine as a reduction assist reagent. Particle size, crystallite size, and crystal phases varied with the type of polyol. The saturation magnetizations of the as-synthesized Fe-Ni particles synthesized in ethylene glycol (EG) and 1-heptanol were similar to the bulk and were 73 emu/g and 83 emu/g, respectively. On the other hand, the coercivities of the same were 41 and 123 Oe. The coercivity of the Fe-Ni particles synthesized in EG decreased to 27 Oe after heat treatment. Though the magnetic properties were very similar irrespective of the polyol used in this study, the Mössbauer spectroscopic measurements revealed that Fe-Ni particles with single permalloy phase was synthesized only when EG was used.

Original languageEnglish
Article number09A320
JournalJournal of Applied Physics
Volume107
Issue number9
DOIs
Publication statusPublished - 2010 May 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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