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Memory effects in YBa2Cu3O7−δ single crystal

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3 Author(s)
C. Rossel ; IBM Research Division, Zurich Research Laboratory, Säumerstrasse 4, CH-3303 Rüschlikon, Switzerland ; Y. Maeno ; F. H. Holtzberg

Measurements of the time dependence of zero-field-cooled (ZFC) and field-cooled (FC) magnetization M in YBa2Cu3O7-δ single crystal have been performed as a function of temperature and magnetic field. The appearance of an echo-like feature in the decay rate S = dM/d ln t at an observing time t equal to the waiting time tw during which the specimen was prepared at a given field H0 and temperature T reveals aging effects in the superconducting state. Similar phenomena reported in spin glasses seem to validate the picture of a superconducting glass state in YBa2Cu3O7-δ.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:33 ,  Issue: 3 )