We introduce a simple approach to evaluate the magnetic field distribution around superconducting samples, based on the London equations; the elementary variable is the vector potential. This procedure has no adjustable parameters, only the sample geometry and the London length, λ, determine the solution. This approach was validated by comparing the induction field calculated to the one measured above MgB2 disks of different diameters, at 20 K and for applied fields lower than 0.4 T. The model can be applied if the flux line penetration inside the sample can be neglected when calculating the induction field distribution outside the superconductor. We conclude by showing on a cup-shape geometry how one can design a magnetic shield satisfying a specific constraint.
Skip Nav Destination
Article navigation
21 December 2013
Research Article|
December 20 2013
Screening magnetic fields by superconductors: A simple model
J.-G. Caputo;
J.-G. Caputo
a)
1
Laboratoire de Mathématiques, INSA de Rouen, Avenue de l'Université
, 76801 Saint-Etienne du Rouvray, France
Search for other works by this author on:
L. Gozzelino;
L. Gozzelino
2
Department of Applied Science and Technology
, Politecnico di Torino, 10129, Torino, Italy
Search for other works by this author on:
F. Laviano;
F. Laviano
2
Department of Applied Science and Technology
, Politecnico di Torino, 10129, Torino, Italy
Search for other works by this author on:
G. Ghigo;
G. Ghigo
2
Department of Applied Science and Technology
, Politecnico di Torino, 10129, Torino, Italy
Search for other works by this author on:
R. Gerbaldo;
R. Gerbaldo
2
Department of Applied Science and Technology
, Politecnico di Torino, 10129, Torino, Italy
Search for other works by this author on:
J. Noudem;
J. Noudem
3
CRISMAT/LUSAC, Physics Department, Université de Caen
, France
Search for other works by this author on:
Y. Thimont;
Y. Thimont
3
CRISMAT/LUSAC, Physics Department, Université de Caen
, France
Search for other works by this author on:
P. Bernstein
P. Bernstein
3
CRISMAT/LUSAC, Physics Department, Université de Caen
, France
Search for other works by this author on:
a)
E-mail: caputo@insa-rouen.fr
J. Appl. Phys. 114, 233913 (2013)
Article history
Received:
August 05 2013
Accepted:
November 30 2013
Citation
J.-G. Caputo, L. Gozzelino, F. Laviano, G. Ghigo, R. Gerbaldo, J. Noudem, Y. Thimont, P. Bernstein; Screening magnetic fields by superconductors: A simple model. J. Appl. Phys. 21 December 2013; 114 (23): 233913. https://doi.org/10.1063/1.4848015
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Pay-Per-View Access
$40.00
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Celebrating notable advances in compound semiconductors: A tribute to Dr. Wladyslaw Walukiewicz
Kirstin Alberi, Junqiao Wu, et al.
GaN-based power devices: Physics, reliability, and perspectives
Matteo Meneghini, Carlo De Santi, et al.