Heat-capacity measurements under uniaxial pressure using a piezo-driven device

Abstract

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 Sr${}_2$RuO${}_4$. By replacing thermometer and adjusting the remaining setup accordingly the temperature regime of the experiment can be adapted to other temperature ranges of interest.

arXiv commentThis manuscript is an extended version of the experimental methods part of arXiv:1906.07597, which is being split into two separate papers

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Cited by in corpus (11)

• Magnetotransport of dirty-limit van Hove singularity quasiparticles
• Elastocaloric determination of the phase diagram of Sr${}_2$RuO${}_4$
• High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
• Thermodynamic and electrical transport properties of UTe${}_2$ under uniaxial stress
• Strain-induced time reversal breaking and half quantum vortices near a putative superconducting tetra-critical point in Sr${}_2$RuO${}_4$
• Continuously tunable uniaxial strain control of van der Waals heterostructure devices
• $T_c$ and the elastocaloric effect of Sr${}_2$RuO${}_4$ under $⟨110⟩$ uniaxial stress: no indications of transition splitting
• Upper Critical Field of Sr${}_2$RuO${}_4$ under In-Plane Uniaxial Pressure
• Uniaxial stress effect on the quasi-one-dimensional Kondo lattice CeCo${}_2$Ga${}_8$
• Second harmonic AC calorimetry technique within a diamond anvil cell
• Development of microwave surface elastoresistivity measurement technique under tunable strain