ORBi: Laurent Philippe - An ac susceptometer for the characterization of large, bulk superconducting samples

Reference : An ac susceptometer for the characterization of large, bulk superconducting samples


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering
	To cite this reference:	http://hdl.handle.net/2268/22617

Title :	An ac susceptometer for the characterization of large, bulk superconducting samples
Language :	English
Author, co-author :	Laurent, Philippe [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
	Fagnard, Jean-François [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
	Vanderheyden, Benoît [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
	Hari Babu, N. [University of Cambridge > IRC in Superconductivity > > >]
	Cardwell, D. A. [University of Cambridge > IRC in Superconductivity > > >]
	Ausloos, Marcel [Université de Liège - ULg > Département de physique > Physique statistique appliquée et des matériaux - S.U.P.R.A.S. >]
	Vanderbemden, Philippe [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Publication date :	2008
Journal title :	Measurement Science & Technology
Publisher :	Institute of Physics
Volume :	19
Issue/season :	8
Pages :	085705
Audience :	International
ISSN :	0957-0233
City :	Bristol
Country :	United Kingdom
Keywords :	[en] ac susceptometer ; superconductivity ; magnetic measurements
Abstract :	[en] The main purpose of this work was to design, develop and construct a simple, low-cost ac susceptometer to measure large, bulk superconducting samples (up to 32 mm in diameter) in the temperature range 78–120 K. The design incorporates a double heating system that enables a high heating rate (25 K h−1) while maintaining a small temperature gradient (<0.2 K) across the sample. The apparatus can be calibrated precisely using a copper coil connected in series with the primary coil. The system has been used successfully to measure the temperature dependence of the ac magnetic properties of entire RE–Ba–Cu–O [(RE)BCO] bulk superconducting domains. A typical ac susceptibility measurement run from 78 K to 95 K takes about 2 h, with excellent temperature resolution (temperature step ∼ 4 mK) around the critical temperature, in particular.
Research units :	Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Engineering and Physical Sciences Research Council - EPSRC ; Royal Military Academy of Belgium
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/22617
DOI :	10.1088/0957-0233/19/8/085705
Other URL :	http://www.iop.org/EJ/abstract/0957-0233/19/8/085705

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