Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published May 3, 1993 | Published
Journal Article Open

Vanishing magnetization relaxation in the high field quantum limit in YBa_2Cu_3O_(7-δ)

Abstract

We have investigated the magnetic response of untwinned single crystals of YBa_2Cu_3O_(7-δ) at millikelvin temperatures using a Bi thin film magnetometer of micron dimensions. Below T=0.8 K, the magnetization relaxation rate S crosses over from thermally activated to quantum behavior. Above a sharply defined and strongly temperature-dependent threshold field, S disappears altogether. In concert with the vanishing magnetization relaxation, discrete steps appear in the magnetic hysteresis B(H), each of which corresponds to the `'stick-slip'' motion of 10^3 vortices under the magnetometer.

Additional Information

© 1993 The American Physical Society. Received 18 February 1993. We have benefited greatly from discussions with H. M. Jaeger, S. R. Nagel, and G. Vasconcelos. This work was supported by the Science and Technology Center for Superconductivity, NSF DMR91-20000. G.W.C. acknowledges support from the U.S. Department of Energy, Basic Energy Sciences-Materials Science under Contract No. W-31-109-ENG-38. C.S.C. acknowledges support from The Materials Research Laboratory at The University of Chicago, NSF DMR88-19860.

Attached Files

Published - PhysRevLett.70.2814.pdf

Published - PhysRevLett.73.2276.pdf

Files

PhysRevLett.70.2814.pdf
Files (300.1 kB)
Name Size Download all
md5:eb8a13c9503b449be6be661695ded06f
217.0 kB Preview Download
md5:7610497d2ee594bdf98ef9c242b51dee
83.1 kB Preview Download

Additional details

Created:
August 20, 2023
Modified:
March 5, 2024