Vortex imaging in superconducting films by Scanning Hall Probe Microscopy

Oral A., BENDİNG S. J., HUMPHREYS R. G., HENİNİ M.

JOURNAL OF LOW TEMPERATURE PHYSICS, vol.105, pp.1135-1140, 1996 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 105
  • Publication Date: 1996
  • Doi Number: 10.1007/bf00753852
  • Journal Name: JOURNAL OF LOW TEMPERATURE PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1135-1140
  • Middle East Technical University Affiliated: No

Abstract

We have used a low noise Scanning Hall Probe Microscope (SHPM) to study vortex structures in superconducting films. The microscope has high magnetic field (similar to 2.9 x 10(-8)T/root Hz at 77 K) and spatial resolution, similar to 0.85 mu m. Magnetic field profiles of single vortices in High T-c YBa2Cu3O7-delta thin films have been successfully measured and the microscopic penetration depth of the superconductor has been extracted as a function of temperature. Flux penetration into the superconductor has been imaged in real time (similar to 8s/frame).