Li Y-S, Borth R, Hicks C W, Mackenzie A P, Nicklas M
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany.
Rev Sci Instrum. 2020 Oct 1;91(10):103903. doi: 10.1063/5.0021919.
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 SrRuO. By replacing thermometer and adjusting the remaining setup accordingly, the temperature regime of the experiment can be adapted to other temperature ranges of interest.
我们报告了一种利用压电驱动装置在样品中产生压缩应变和拉伸应变来测量大单向压力下热容量的技术的发展情况。我们的装置针对8K至毫开尔文的温度范围进行了优化。使用交流热容量技术，我们能够实现极高的分辨率，并探测样品中均匀应变的部分。我们在非常规超导体SrRuO上展示了我们装置的能力。通过更换温度计并相应地调整其余装置，实验的温度范围可以适应其他感兴趣的温度范围。
