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Detailed study of ultra-soft magnetic properties of Fe74Cu0.8Nb2.7Si15.5B7
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2011 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 91, no 16, 2117-2139 p.Article in journal (Refereed) Published
Abstract [en]

The magnetic properties of nanocrystalline Fe74Cu0.8Nb2.7Si15.5B7 alloy, which were rapidly solidified and then annealed at various temperatures between 475 and 650 degrees C for different holding time, have been studied. Grain size, silicon content and the lattice parameter of alpha-Fe(Si) nanograins at the annealing temperatures were determined. Curie temperature of the amorphous phase was determined from the temperature dependence of permeability. For higher annealing temperatures and times, some Si diffused out of the alpha-Fe(Si) phase and formed an ordered DO3 phase of Fe3Si. This changed the overall magnetostriction and average anisotropy of the matrix, which deteriorated the magnetic softness of the material at higher annealing temperatures. Ultra-soft magnetic properties were achieved by averaging the random anisotropy via exchange interaction. Hysteresis loops for samples in as-cast and annealed conditions have also been studied.

Place, publisher, year, edition, pages
2011. Vol. 91, no 16, 2117-2139 p.
National Category
Natural Sciences
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
URN: urn:nbn:se:uu:diva-179744DOI: 10.1080/14786435.2010.548835ISI: 000289507600005OAI: oai:DiVA.org:uu-179744DiVA: diva2:545991
Available from: 2012-08-22 Created: 2012-08-22 Last updated: 2012-08-22

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