Particle size dependence of the magnetic properties of ultrafine granular films

S. H. Liou, C. L. Chien

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47 Citations (Scopus)

Abstract

Magnetic granular solids consist of ultrafine metal granules of nanometer sizes embedded in an insulating medium. The magnetic properties are dictated by the microstructure such as particle size, metal volume fraction, which are process controlled. We report the results of a series of granular Fe 60(SiO2)40 films in which the particle size has been systematically varied. The magnetic coercivity, ranging from 500 to 2200 Oe, increases with particle size. The ferromagnetic-superparamagnetic transition had been studied by SQUID magnetometry and Mössbauer spectroscopy. The value of the magnetic anisotropy energy is found to be much larger than that due to magnetocrystalline anisotropy.

Original languageEnglish (US)
Pages (from-to)4240-4242
Number of pages3
JournalJournal of Applied Physics
Volume63
Issue number8
DOIs
StatePublished - Dec 1 1988

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magnetic properties
anisotropy
metals
magnetic measurement
coercivity
microstructure
spectroscopy
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Particle size dependence of the magnetic properties of ultrafine granular films. / Liou, S. H.; Chien, C. L.

In: Journal of Applied Physics, Vol. 63, No. 8, 01.12.1988, p. 4240-4242.

Research output: Contribution to journalArticle

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