Preparation and magnetic properties of Fe100-xNix-SiO2 granular alloy solid using a sol-gel method

Jian Ping Wang, De Hua Han, He Lie Luo, Nei Fai Gao, Yuan Yuan Liu

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16 Scopus citations

Abstract

The preparation of Fe100-xNix-SiO2 (x = 0, 20, 60, 80) granular solid using a sol-gel method is investigated by means of X-ray diffraction and electron transmission micrography. Pure Fe metal, Fe40Ni60 and Fe20Ni80 ultrafine alloy particles dispersed in Fe-SiO2, Fe40Ni60-SiO2 and Fe20Ni80-SiO2 granular solid have been fabricated which are confirmed by the result of the XRD and the Mössbauer spectrums. The evolution of the magnetic properties for the Fe40Ni60-SiO2 and Fe20Ni80-SiO2 granular solid during reducing are described in detail and explained by using superparamagnetism, single-domain and multidomain theory.

Original languageEnglish (US)
Pages (from-to)L251-L256
JournalJournal of Magnetism and Magnetic Materials
Volume135
Issue number3
DOIs
StatePublished - Aug 1994
Externally publishedYes

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