Composition-and phase-controlled high-magnetic-moment Fe 1-xCox nanoparticles for biomedical applications

Ying Jing, Shi Hai He, Jianping Wang

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Fe-Co alloy nanoparticles are studied in this work of different composition condition. Fe1-xCox nanoparticles were synthesized by a physical method with well-developed crystal structure, uniform size, and high saturation magnetization. Their magnetic property is found to be a function of composition, which indicates successful control of the synthesis process. Exchange bias was found for Fe1-xCox core-oxide shell particles after natural oxidization in air. It was a result of interfacial coupling between Fe/Co and their oxides. The property of the surface oxide varies with composition and so does the coupling strength. Oxidation and interparticle interactions lead to much different magnetic response of nanoparticles compared to un-oxidized, non-interacting ones.

Original languageEnglish (US)
Article number6392435
Pages (from-to)197-200
Number of pages4
JournalIEEE Transactions on Magnetics
Volume49
Issue number1
DOIs
StatePublished - Jan 4 2013

Keywords

  • High-magnetic-moment
  • iron cobalt alloys
  • magnetic nanoparticle sensing
  • magnetic nanoparticles
  • molecular diagnosis

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