Lengfellner, Hans and Schnellbögl, Andreas and Betz, Josef and Renk, Karl Friedrich and Prettl, Wilhelm (1990) Nernst effect in Tl-Ba-Ca-Cu-O superconducting films due to infrared laser heating. International Journal of Infrared and Millimeter Waves 11 (5), pp. 631-639.
A Nernst effect has been observed in a high temperature superconductor for the first time. Irradiating superconducting Tl–Ba–Ca–Cu–O thin films by short pulses of a TEA-CO2 laser, a photovoltaic signal is detected perpendicular to a magnetic field applied parallel to the film surface. The signal is attributed to magnetic flux line depinning and flux line transport driven by the laser induced temperature gradient. The results are described by thermal flux line activation leading to a calculated distribution of pinning energies from 100 K to 4000 K.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Hans Lengfellner|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
|Keywords:||Nernst effect - high temperature superconductor - flux pinning - pinning energies|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||18 Oct 2010 11:48|
|Last Modified:||23 Nov 2012 10:40|