Scanning hall-probe microscopy of a vortex and field fluctuations in La1.85Sr0.15CuO4 films


Journal Article (Letter)

A high-resolution scanning Hall-probe microscope is used to spatially resolve vortices in high-temperature superconducting La1.85Sr0.15CuO4 films. At low magnetic fields, a disordered vortex arrangement is observed. A fit to the surface field of an individual vortex is consistent with one flux quantum, and is used to determine the local penetration depth and its temperature dependence. At higher fields, magnetic fluctuations are observed and compared to a collective pinning model. For films grown with the c-axis tilted from the surface normal, oval vortices are observed. © 1992 IOP Publishing Ltd.

Full Text

Duke Authors

Cited Authors

  • Chang, AM; Hallen, HD; Hess, HF; Kao, HL; Kwo, J; Sudbø, A; Chang, TY

Published Date

  • December 1, 1992

Published In

Volume / Issue

  • 20 / 7

Start / End Page

  • 645 - 650

Electronic International Standard Serial Number (EISSN)

  • 1286-4854

International Standard Serial Number (ISSN)

  • 0295-5075

Digital Object Identifier (DOI)

  • 10.1209/0295-5075/20/7/012

Citation Source

  • Scopus