Heat-capacity measurements under uniaxial pressure using a piezo-driven device
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We report the development of a technique to measure heat capacity at large uniaxial pressure using a piezoelectric-driven device generating compressive and tensile strain in the sample. Our setup is optimized for temperatures ranging from 8 K down to millikelvin. Using an AC heat-capacity technique, we are able to achieve an extremely high resolution and to probe a homogeneously strained part of the sample. We demonstrate the capabilities of our setup on the unconventional superconductor Sr2RuO4. By replacing thermometer and adjusting the remaining setup accordingly, the temperature regime of the experiment can be adapted to other temperature ranges of interest.
Li , Y-S , Borth , R , Hicks , C W , Mackenzie , A P & Nicklas , M 2020 , ' Heat-capacity measurements under uniaxial pressure using a piezo-driven device ' , Review of Scientific Instruments , vol. 91 , no. 10 , 103903 . https://doi.org/10.1063/5.0021919
Review of Scientific Instruments
Coyright © 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
DescriptionY.S.L. acknowledges the support of a St Leonards scholarship from the University of St Andrews, the Engineering and Physical Sciences Research Council via the Scottish Condensed Matter Centre for Doctoral Training under Grant No. EP/G03673X/1, and the Max Planck Society.
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