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Characterization and assessment of the wideband magnetic properties of nanocrystalline alloys and soft ferrites

Published online by Cambridge University Press:  13 August 2018

Enzo Ferrara Open the ORCID record for Enzo Ferrara [Opens in a new window] ,
Fausto Fiorillo ,
Cinzia Beatrice ,
Samuel Dobák ,
Carlo Ragusa ,
Alessandro Magni  and
Carlo Appino
Enzo Ferrara*
Affiliation:
Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy
Fausto Fiorillo
Affiliation:
Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy
Cinzia Beatrice
Affiliation:
Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy
Samuel Dobák
Affiliation:
Department of Nanosciences and Materials, Institute of Physics, P.J. Šafárik University, Košice, Slovakia
Carlo Ragusa
Affiliation:
Department of Energy, Politecnico di Torino, Torino, Italy
Alessandro Magni
Affiliation:
Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy
Carlo Appino
Affiliation:
Istituto Nazionale di Ricerca Metrologica INRIM, Torino, Italy
*
a)Address all correspondence to this author. e-mail: e.ferrara@inrim.it
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Abstract

Efficient applications of magnetic cores in sensing and power electronics require low-loss and versatile soft magnetic materials, with excellent response on a wide range of frequencies. This objective is traditionally pursued with ferrite and Permalloy tape cores, available under a variety of properties. Comparable and even superior soft magnetic behavior can, however, be obtained with amorphous and nanocrystalline alloys, with the latter, in particular, combining flexible response to thermal treatments with high magnetic saturation. Broadband precise magnetic characterization of these materials, crucial to their use as inductive cores, is fully appreciated when associated with assessment by physical modeling. Comprehensive measuring approach and significant results obtained in sintered soft ferrites and nanocrystalline ribbons up to 1 GHz are highlighted in this paper. We show how broadband loss and permeability behaviors can be quantitatively interpreted in the framework of the loss separation concept, applied to eddy current and spin damping dissipation mechanisms.

Keywords

soft ferritesnanocrystalline alloysmagnetic losseswideband magnetic measurementsloss models
Type
REVIEW
Information
Journal of Materials Research , Volume 33 , Issue 15: Focus Issue: Soft Magnetic Materials: Synthesis, Characterization, and Applications , 13 August 2018 , pp. 2120 - 2137
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

b)

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.

References

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