Reference : Measurement of the magnetic field inside the holes of a drilled bulk high-Tc supercon...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/13114
Measurement of the magnetic field inside the holes of a drilled bulk high-Tc superconductor
English
Lousberg, Grégory mailto [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
Fagnard, Jean-François [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Noudem, Jacques G [> >]
Ausloos, Marcel [Université de Liège - ULg > Département de physique > Physique statistique appliquée et des matériaux - S.U.P.R.A.S. >]
Vanderheyden, Benoît [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes > >]
Vanderbemden, Philippe [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Mar-2009
Superconductor Science and Technology
Institute of Physics
22
045009
Yes (verified by ORBi)
International
0953-2048
Bristol
United Kingdom
[en] We use macroscopic holes drilled in a bulk YBCO superconductor to probe its magnetic
properties in the volume of the sample. The sample is subjected to an AC magnetic flux with a
density ranging from 30 to 130 mT and the flux in the superconductor is probed by miniature
coils inserted in the holes. In a given hole, three different penetration regimes can be observed:
(i) the shielded regime, where no magnetic flux threads the hole; (ii) the gradual penetration
regime, where the waveform of the magnetic field has a clipped sine shape whose fundamental
component scales with the applied field; and (iii) the flux concentration regime, where the
waveform of the magnetic field is nearly a sine wave, with an amplitude exceeding that of the
applied field by up to a factor of two. The distribution of the penetration regimes in the holes is
compared with that of the magnetic flux density at the top and bottom surfaces of the sample,
and is interpreted with the help of optical polarized light micrographs of these surfaces. We
show that the measurement of the magnetic field inside the holes can be used as a local
characterization of the bulk magnetic properties of the sample.
http://hdl.handle.net/2268/13114

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