Index of content:
Volume 77, Issue 7, July 2006
- THERMOMETRY; THERMAL DIFFUSIVITY; ACOUSTIC; PHOTOTHERMAL AND PHOTOACOUSTIC
77(2006); http://dx.doi.org/10.1063/1.2219972View Description Hide Description
We present a contactless method of detecting small changes in the surfacetemperature of metallic samples over a short time period. The thermometry method incorporates a contactless heater and simplifies sample preparation requirements for calorimetric measurements. We demonstrate that we can measure small temperature shifts in at midrange temperatures. This method does not serve as a conventional thermometer but as an in situthermometer useful for narrow temperature ranges, such as the region of a phase transition (often exploited in bolometers). The manganite material was chosen as a test material for our experiments because it is a well characterized material where resistivity and magnetization [Kuwakara et al., Science270, 961 (1995)] and thermal conductivity [Kim et al., American Physical Society March Meeting, W24.009 (2004)] have been previously measured and the material undergoes a metal-insulator transition.