Abstract
By doing magnetization measurements during magnetic field sweeps on thin films of the new superconductor it is found that in a low-temperature and low-field region small flux jumps are taking place. This effect strongly suppresses the central magnetization peak leading to reduced nominal superconducting critical current density at low temperatures. A borderline for this effect to occur is determined on the field-temperature phase diagram. It is suggested that the small size of the flux jumps in films is due to the higher density of small defects and the relatively easy thermal diffusion in thin films in comparison with bulk samples.
- Received 12 July 2001
DOI:https://doi.org/10.1103/PhysRevB.65.064512
©2002 American Physical Society