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Zero-field cooled magnetization of amorphous Fe1-xCx particles - field dependence of the maximum
Chalmers University of Technology, Sweden.
RISE, Swedish ICT, Acreo. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-6662-8023
Chalmers University of Technology, Sweden.
1995 (English)In: Journal of Physics: Condensed Matter, Vol. 7, p. 9263-9268Article in journal (Refereed) Published
Abstract [en]

We measured the zero-field cooled magnetization, MZPC of a frozen magnetic liquid with amorphous Fe1-xCx particles. MZFC has a maximum at Tp approximately=20 K, which is interpreted as due to blocking of superparamagnetic relaxation in single particles. The maximum shifts towards higher temperatures with increasing measuring field. The shift is explained by the nonlinear field dependence of the magnetization of particles with a size distribution. At temperatures below Tp the magnetic particles have a coercivity and remanence in good agreement with those expected for an ensemble of non-interacting uniaxial particles with a random distribution of easy axes.

Place, publisher, year, edition, pages
1995. Vol. 7, p. 9263-9268
Keywords [en]
magnetic nanoparticles, Magnetic analysis
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-32347DOI: 10.1088/0953-8984/7/48/015Scopus ID: 2-s2.0-36149029623OAI: oai:DiVA.org:ri-32347DiVA, id: diva2:1152206
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2019-10-10Bibliographically approved

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