Low field irreversible response in the granular S.C. La1.8Sr0.2CuO4
Abstract
Low field low frequency a.c. susceptibility measurements show that the response is strongly non linear, the shielding current growing sublinearly with the increase of the applied field, and irreversible down to 50 μ G. A new model of diamagnetic response is proposed, based on the idea of a fractal organization of the free energy landscape in the granular network.
- Publication:
-
Czechoslovak Journal of Physics Supplement
- Pub Date:
- February 1996
- DOI:
- 10.1007/BF02583846
- Bibcode:
- 1996CzJPS..46.1077G