Title :
Interface thermal resistances of La0.7(Pb0.7Sr0.3)0.3MnO 3 films on the LaAlO3 and SrTiO3 substrates. Millimeter wave diagnostics
Author :
Medvedev, Yu.V. ; Nikolaenko, Yu M. ; Grishin, A.M. ; Khartsev, S.I.
Author_Institution :
Physicotech. Inst., Acad. of Sci., Donetsk, Ukraine
Abstract :
The La0.7(Pb0.7Sr0.3)0.3 MnO3 films were produced by pulse laser deposition-method. The composition of the film material provided high value of temperature coefficient of electrical resistance at room temperature. The methods of measurement of boundary resistance in HTSC film structures haves been studied. Stationary method is based on the measurement of the temperature difference between two metal strips placed on the film. One of them is heated by relatively large dc. Other strips with a low dc measure the temperature of substrate. The main difficulty of estimation by this method consists in temperature gradient of substrate and temperature drop on the additional strip/film interface. Second method of evaluation is based on the analysis of time constant of optical bolometric response
Keywords :
high-temperature superconductors; lanthanum compounds; lead compounds; millimetre wave measurement; pulsed laser deposition; strontium compounds; superconducting thin films; thermal resistance; HTSC film structures; La0.7(Pb0.7Sr0.3)0.3 MnO3; La0.7(Pb0.7Sr0.3)0.3 MnO3-LaAlO3; La0.7(Pb0.7Sr0.3)0.3 MnO3-SrTiO3; LaAlO3; SrTiO3; boundary resistance; interface thermal resistances; metal strip/film interface; millimeter wave diagnostics; optical bolometric response; pulse laser deposition method; temperature coefficient of electrical resistance; time constant; Electric resistance; Electrical resistance measurement; Optical films; Optical pulses; Pulsed laser deposition; Strips; Strontium; Substrates; Temperature measurement; Thermal resistance;
Conference_Titel :
Physics and Engineering of Millimeter and Sub-Millimeter Waves, 2001. The Fourth International Kharkov Symposium on
Conference_Location :
Kharkov
Print_ISBN :
0-7803-6473-2
DOI :
10.1109/MSMW.2001.946834
