MEASUREMENT OF THERMAL-PROPERTIES OF THIN DIELECTRIC FILMS AND ANISOTROPIC SOLIDS BY AC HOT-STRIP METHOD

The present work deals with the foundations of the theory of the metho d of measuring the thermal properties of anisotropic solids and thin d ielectric films deposited onto them. The experimental setup is briefly described. The authors demonstrate the possibility of measuring a set of thermal properties of solids by means of recording the amplitude a nd phase of temperature oscillations of a strip, which has a width com parable with the attenuation length of a temperature wave in the sampl e. The paper offers the results of measurements of the heat capacity, thermal conductivity, thermal diffusivity and thermal activity of leuc osapphire. The thermal conductivity of an SrTiO3 him about 2 mu m thic k sputtered onto a single crystal of leucosapphire was determined by m easuring the temperature oscillation amplitude at various frequencies.