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The influence of particle size interactions on the magnetization susceptibility of nanometre-size particles
Chalmers University of Technology, Sweden.
RISE., Swedish ICT, Acreo.ORCID-id: 0000-0002-6662-8023
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
1995 (engelsk)Inngår i: Journal of Physics: Condensed Matter, ISSN 09538984, Vol. 7, s. 9269-9277Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We studied the magnetic properties of frozen magnetic liquids containing amorphous Fe1-xCx particles. By varying the particle size and concentration, we could separate single particle effects from interactions. In samples containing particles with median diameters 5.0 nm and 3.8 nm and with spontaneous saturation magnetizations 7.1 kA m-1 and 9.2 kA m -1, effects of particle interactions are observed. For 3.2 nm no interactions were observed. In samples with negligible interactions the superparamagnetic blocking temperature increases with the particle size. The effective anisotropy constant increases with decreasing particle size, implying that the anisotropy is enhanced by surface effects.

sted, utgiver, år, opplag, sider
1995. Vol. 7, s. 9269-9277
Emneord [en]
magnetic nanoparticles, Magnetic analysis
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-32348DOI: 10.1088/0953-8984/7/48/016Scopus ID: 2-s2.0-0042143356OAI: oai:DiVA.org:ri-32348DiVA, id: diva2:1152207
Tilgjengelig fra: 2017-10-24 Laget: 2017-10-24 Sist oppdatert: 2020-12-01bibliografisk kontrollert

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