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Demagnetization effects in dense nanoparticle assemblies
Univ Castilla La Mancha, IRICA, E-13071 Ciudad Real, Spain.;Univ Castilla La Mancha, Dept Fis Aplicada, E-13071 Ciudad Real, Spain..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Inst Bioengn & Nanotechnol, 31 Biopolis Way, Singapore 138669, Singapore..
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2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 109, no 15, 152404Article in journal (Refereed) Published
Abstract [en]

We highlight the relevance of demagnetizing-field corrections in the characterization of dense magnetic nanoparticle assemblies. By an analysis that employs in-plane and out-of-plane magnetometry on cylindrical assemblies, we demonstrate the suitability of a simple analytical formula-based correction method. This allows us to identify artifacts of the demagnetizing field in temperature-dependent susceptibility curves (e.g., shoulder peaks in curves from a disordered assembly of essentially bare magnetic nanoparticles). The same analysis approach is shown to be a straightforward procedure for determining the magnetic nanoparticle packing fraction in dense, disordered assemblies.

Place, publisher, year, edition, pages
2016. Vol. 109, no 15, 152404
National Category
Condensed Matter Physics Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-308922DOI: 10.1063/1.4964517ISI: 000386534800031OAI: oai:DiVA.org:uu-308922DiVA: diva2:1051177
Funder
Swedish Research Council
Available from: 2016-12-01 Created: 2016-12-01 Last updated: 2016-12-02Bibliographically approved

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Andersson, Mikael S.Mathieu, Roland
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