About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review Letters
Paper
Subpicovolt resolution measurements of the current-voltage characteristics of twinned crystalline YBa2Cu3O7-x: New evidence for a vortex-glass phase
Abstract
We present an improved contactless technique that allows measurement of the current-voltage (I-V) curves of YBa2Cu3O7-x single crystals in large magnetic fields with 5 orders of magnitude improved voltage resolution compared to conventional transport measurements. The crystals are shaped in the form of rings. The I-V curves are obtained by applying a small triangular oscillation of magnetic field and measuring the induced current in the ring using a local Hall probe. The magnetic field resolution achieved is 1 ppm. The I-V curves are obtained very close to the glass transition temperature TG, down to voltage levels of 0.1 pV, and show the characteristic change of slope on a log-log plot typical of a glassy transition. © 1995 The American Physical Society.