High-resolution scanning hall probe microscopy

Published

Conference Paper

© 1993 SPIE. All rights reserved. A high resolution scanning Hall probe microscope is used to spatially resolve vortices in high temperature superconducting Bi2Sr2CaCu2O8+δ crystals. We observe a partially ordered vortex lattice at several different applied magnetic fields and temperatures. At higher temperatures, a limited amount of vortex re-arrangement is observed, but most vortices remain fixed for periods long compared to the imaging time of several hours even at temperatures as high as 75°K (the superconducting transition temperature for these crystals is ∼84°K). A measure of the local magnetic penetration depth can be obtained from a fit to the surface field of several neighboring vortices, and has been measured as a function of temperature. In particular, we have measured the zero temperature penetration depth and found it to be 275 ± 40 nm.

Full Text

Duke Authors

Cited Authors

  • Hallen, HD; Hess, HF; Chang, AM; Pfeiffer, LN; West, KW; Mitzi, DB

Published Date

  • June 4, 1993

Published In

Volume / Issue

  • 1855 /

Start / End Page

  • 152 - 157

Electronic International Standard Serial Number (EISSN)

  • 1996-756X

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.146371

Citation Source

  • Scopus