Zeuner, S. and Lengfellner, Hans and Betz, J. and Renk, Karl Friedrich and Prettl, Wilhelm
Heat propagation in high Tc films investigated by optical response measurements.
Applied Physics Letters 61 (8), pp. 973-975.
The optical response of granular Tl‐Ba‐Ca‐Cu‐O films has been used to investigate thermal properties of the films. An analysis of the response using a heat transfer model yields a thermal diffusivity D=10−3 cm2/s at 150 K which rises to 6×10−3 cm2/s at a temperature of 30 K and allows for an estimation of the boundary resistance Rbd≊10−3 K cm2/W between film and substrate. The dependence of the response time on film thickness obtained from the heat transfer model is compared with published data indicating that in many experiments the observed response is mainly bolometric in origin.
|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
|74.25.Bt; 74.25.N-; 44.30.+v; 74.70.-b||PACS|
|Keywords:||THALLIUM OXIDES, BARIUM OXIDES, CALCIUM OXIDES, COPPER OXIDES, MULTI−ELEMENT COMPOUNDS, HIGH−TC SUPERCONDUCTORS, HEAT TRANSFER, THERMAL CONDUCTIVITY, DIFFUSIVITY, LASER−RADIATION HEATING, IV CHARACTERISTIC, ELECTRIC CONDUCTIVITY, THERMAL BOUNDARY RESISTANCE|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||11 Oct 2010 12:19|
|Last Modified:||23 Nov 2012 08:54|