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Study of magnetoimpedance effect of Co-based amorphous ribbons after current annealing at various kinds of ambient pressure
2009 (English)In: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 355, no 52-54, 2653-2656 p.Article in journal (Refereed) Published
Abstract [en]

The physical properties of magnetic amorphous alloys can be improved by using different annealing processes. In this paper, for annealing purposes, different driving currents were flowed through Co-based magnetic amorphous ribbons at different ambient air pressures between 5 x 10(-5) mbar and 10(3) mbar. The magnetoimpedance effect in the annealed samples was studied at a frequency interval between 250 kHz and 10 MHz. Magnetic properties and microstructures of samples were investigated by means of alternative gradient force magnetometers and X-ray diffraction. Regarding the giant magnetoimpedance (GMI) effect, annealing at different ambient pressures with the same current can lead to various responses. For annealing at higher pressures such as in air, higher current is necessary for crystallization of samples which results in the development of greater transverse magnetic anisotropy.

Place, publisher, year, edition, pages
2009. Vol. 355, no 52-54, 2653-2656 p.
Keyword [en]
Alloys, Crystallization, X-ray diffraction, Magnetic properties, Oxide glasses
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-32562DOI: 10.1016/j.jnoncrysol.2009.09.002ISI: 000272760700021OAI: oai:DiVA.org:kth-32562DiVA: diva2:411399
Note
QC 20110418Available from: 2011-04-18 Created: 2011-04-15 Last updated: 2017-12-11Bibliographically approved

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Mohseni, Majid
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