https://doi.org/10.1140/epjp/s13360-023-04200-0
Regular Article
Hysteresis loops of annealed MuMetal thick wire resulting from ring and cylinder specimens
Departament de Física, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
Received:
15
February
2023
Accepted:
15
June
2023
Published online:
7
July
2023
Welded ring and long cylinder specimens were prepared from a thick MuMetal wire and heat-treated at high temperature followed by slow cooling, with their major hysteresis M(H) loops measured by an automatic ballistic method and a demagnetizing corrected solenoid method, respectively. Having a similar ratio of remanence to saturation magnetization, 
, the loop of a well welded ring has a normal shape of coercivity 
A/m, but the loop of cylinders of 
A/m has a re-entrant feature of width increasing from 
at 
to a maximum and then decreasing with increasing 
, which is attributed to different domain structures induced by cooling in earth field. It is preferable to measure magnetic properties of soft magnetic wires by using long cylinder specimens. A complete data table of accurately calculated fluxmetric demagnetizing factor 
as a function of the aspect ratio 
and material susceptibility 
of paramagnetic cylinders is given to be used for demagnetizing correction in the solenoid measurement of semi-hard, semi-soft, and soft magnetic materials.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
