Poster (Scientific congresses and symposiums)
Non-destructive characterization of DC volume magnetic properties of large, bulk (RE)BCO superconducting samples
Fagnard, Jean-François; Philippe, Matthieu; Vanderheyden, Benoît et al.
2012Applied Superconductivity Conference ASC2012
 

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Keywords :
Bulk superconductors
Abstract :
[en] The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in diameter. The usual magnetic characterization gives relies on miniature Hall probe mapping and gives information about the field distribution above the sample surface. If volume properties are required (e.g. M(H) loops), the sample needs to be cut in smaller pieces, since the DC magnetic characterization systems for measurements at cryogenic temperatures generally accommodate samples of relatively small size (typically < 5-10 mm diameter). In this work we describe how the M(H) loops of large bulk superconducting samples up to 20 mm diameter can be determined using home-made sensing coils placed in the experimental chamber of a Quantum Design Physical Property Measurement System (PPMS). Magnetic properties are measured and compared to those given by several Hall probes attached to both faces of sample. The system is used successfully to measure the DC hysteresis loops of entire (RE)BCO bulk superconducting domains. A careful data acquisition and numerical integration of pick-up coil voltage enables the sweep rate of the magnetic field to be varied from 0.5 to 10 mT/s while keeping an excellent signal/noise ratio.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Disciplines :
Physics
Electrical & electronics engineering
Author, co-author :
Fagnard, Jean-François  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Philippe, Matthieu;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Vanderheyden, Benoît  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Language :
English
Title :
Non-destructive characterization of DC volume magnetic properties of large, bulk (RE)BCO superconducting samples
Publication date :
October 2012
Event name :
Applied Superconductivity Conference ASC2012
Event place :
Portland, OR, United States
Event date :
Du 8 octobre 2012 au 12 octobre 2012
Audience :
International
Name of the research project :
SUPERCOOL - ARC 11/06-03
Funders :
The research was funded through the ARC grant for Concerted Research Actions, financed by the French Community of Belgium (Wallonia-Brussels Federation).
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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since 16 November 2017

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