Scaling properties of the electrical behaviour of 2:2:1:2 BSCCO whiskers

✍ Scribed by PJ King; A Kirk; Yu Latyshev; AM Nikitina; IG Gorlova

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 157 KB
• Volume: 194-196
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)91241-6

✦ Synopsis

The electrical transport of single crystal whiskers of the 2:2:1:2 phase of Bismuth Strontium Calcium Copper Oxide (BSCCO), and of very small transverse dimensions, has been studied as a function of temperature and magnetic field. Over a very wide range of magnetic fields the current voltage characteristics obey a simple but powerful scaling relationship. This scaling has made possible a very detailed study of the similarities between that data and the predictions of the thermally activated flux creep (TAFC) model of Kim and Anderson. At lower fields and currents the temperature and magnetic field dependence of the barrier height displays typical behaviour for that class of model, but the flux-bundle parameters deduced are temperature dependent. At high fields and high currents the observed behaviour differs very significantly from the TAFC prediction.