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Volume 14
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10.3390/ma14247745
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Article

Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency

by
Lucian-Gabriel Petrescu
1,*,
Maria-Catalina Petrescu
1,
Emil Cazacu
1 and
Catalin-Daniel Constantinescu
2,*
1
Department of Electrical Engineering, Faculty of Electrical Engineering, University “POLITEHNICA” of Bucharest, 313 Splaiul Independentei, RO-060042 Bucharest, Romania
2
Laboratoire LP3/UMR 7341, CNRS, Aix-Marseille Université, F-13009 Marseille, France
*
Authors to whom correspondence should be addressed.
Materials 2021, 14(24), 7745; https://doi.org/10.3390/ma14247745
Submission received: 11 October 2021 / Revised: 2 December 2021 / Accepted: 10 December 2021 / Published: 15 December 2021
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Abstract

Soft magnetic materials are at the core of electromagnetic devices. Planar transformers are essential pieces of equipment working at high frequency. Usually, their magnetic core is made of various types of ferrites or iron-based alloys. An upcoming alternative might be the replacement the ferrites with FINEMET-type alloys, of nominal composition of Fe73.5Si13.5B9Cu3Nb1 (at. %). FINEMET is a nanocrystalline material exhibiting excellent magnetic properties at high frequencies, a soft magnetic alloy that has been in the focus of interest in the last years thanks to its high saturation magnetization, high permeability, and low core loss. Here, we present and discuss the measured and modelled properties of this material. Owing to the limits of the experimental set-up, an estimate of the total magnetic losses within this magnetic material is made, for values greater than the measurement limits of the magnetic flux density and frequency, with reasonable results for potential applications of FINMET-type alloys and thin films in high frequency planar transformer cores.
Keywords: FINEMET; soft magnetic alloy; Steinmetz losses estimation; nanocrystalline ribbon; planar transformers; high frequency applications FINEMET; soft magnetic alloy; Steinmetz losses estimation; nanocrystalline ribbon; planar transformers; high frequency applications

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MDPI and ACS Style

Petrescu, L.-G.; Petrescu, M.-C.; Cazacu, E.; Constantinescu, C.-D. Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency. Materials 2021, 14, 7745. https://doi.org/10.3390/ma14247745

AMA Style

Petrescu L-G, Petrescu M-C, Cazacu E, Constantinescu C-D. Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency. Materials. 2021; 14(24):7745. https://doi.org/10.3390/ma14247745

Chicago/Turabian Style

Petrescu, Lucian-Gabriel, Maria-Catalina Petrescu, Emil Cazacu, and Catalin-Daniel Constantinescu. 2021. "Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency" Materials 14, no. 24: 7745. https://doi.org/10.3390/ma14247745

APA Style

Petrescu, L.-G., Petrescu, M.-C., Cazacu, E., & Constantinescu, C.-D. (2021). Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency. Materials, 14(24), 7745. https://doi.org/10.3390/ma14247745

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