Frequency-dependent sensitivity of AC elastocaloric effect measurements explored through analytical and numerical models

Abstract

We present a comprehensive study of the frequency-dependent sensitivity for measurements of the AC elastocaloric effect by applying both exactly soluble models and numerical methods to the oscillating heat flow problem. These models reproduce the finer details of the thermal transfer functions observed in experiments, considering here representative data for single-crystal Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$. Based on our results, we propose a set of practical guidelines for experimentalists using this technique. This work establishes a baseline against which the frequency response of the AC elastocaloric technique can be compared and provides intuitive explanations of the detailed structure observed in experiments.

15 pages, 10 figures

References in corpus (11)

• DOLFIN: Automated Finite Element Computing
• Divergent nematic susceptibility in an iron arsenide superconductor
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Piezoelectric-based apparatus for strain tuning
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• Symmetric and antisymmetric strain as continuous tuning parameters for electronic nematic order
• AC Elastocaloric effect as a probe for thermodynamic signatures of continuous phase transitions
• Specific heat, thermal conductivity, and magnetic susceptibility of cyanate ester resins --- An alternative to commonly used epoxy resins
• Possible Sign-Reversing s-Wave Superconductivity in Co-Doped BaFe2As2 Proved by Thermal Transport Measurements
• Measurement of Elastoresistivity at Finite Frequency by Amplitude Demodulation
• Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet

Cited by in corpus (5)

• Elastocaloric determination of the phase diagram of Sr${}_2$RuO${}_4$
• Elastocaloric signature of nematic fluctuations
• Absence of $E_{2g}$ nematic instability and dominant $A_{1g}$ response in the kagome metal CsV${}_3$Sb${}_5$
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
• Probing multipolar order in the candidate altermagnet MnF${}_2$ through the elastocaloric effect under strain