Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Annihilation of vortex-antivortex pairs in a superconducting shield

Technical Report ·
OSTI ID:6356474

A new type of magnetic shielding device has been constructed for use in superconducting microelectronic applications where low ambient magnetic field is desirable. The shield was a specially designed superconducting thin film in the shape of a long cylindrical tube with a low pinning material in the central region and high flux pinning regions at the end. It was shown that magnetic flux perpendicular to the axis of a cylinder could be swept out of the interior of the shield by moving vortex-antivortex pairs to one side of the shield where they annihilate. The flux sweeping properties of the shield were found to work well in a small temperature window close to the transition temperature where the critical current for depinning vortices was less than the critical current for the formation of hot spots. Once the vortices are swept out, the shield can be cooled to enhance the Meissner shielding effects against other stray fields. In the course of designing and testing the shield, a systematic study of flux pinning was made for the low magnetic field regime between 1 mOe and 30 Oe.

Research Organization:
Ames Lab., IA (USA)
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
6356474
Report Number(s):
IS-T-1276; ON: DE87010921
Country of Publication:
United States
Language:
English

Similar Records

Annihilation of vortex-antivortex pairs in a superconducting shield
Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1985 · OSTI ID:5415930
Flux annihilation in superconducting tubes
Journal Article · Sat Nov 30 23:00:00 EST 1985 · Appl. Phys. Lett.; (United States) · OSTI ID:6176535
Imaging the spontaneous formation of vortex-antivortex pairs in planar superconductor/ferromagnet hybrid structures.
Journal Article · Thu Jul 07 00:00:00 EDT 2011 · Phys. Rev. B · OSTI ID:1020702

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM
ANNIHILATION
BASIC INTERACTIONS
BISMUTH ALLOYS
DATA
DESIGN
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
FILMS
INFORMATION
INTERACTIONS
LEAD ALLOYS
LEAD BASE ALLOYS
MAGNETIC FLUX
MAGNETIC SHIELDING
MATHEMATICAL MODELS
MATHEMATICS
MAXWELL EQUATIONS
MEISSNER-OCHSENFELD EFFECT
METALS
NUMERICAL ANALYSIS
NUMERICAL DATA
PARTIAL DIFFERENTIAL EQUATIONS
SHIELDING
SUPERCONDUCTING FILMS