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

Area of Science:

• Condensed matter physics
• Materials science
• Thermodynamics

Background:

• The AC elastocaloric effect is a key phenomenon in materials science.
• Understanding its frequency-dependent sensitivity is crucial for accurate measurements.
• Experimental data for single-crystal Ba(Fe1-xCox)2As2 serve as a representative case.

Purpose of the Study:

• To comprehensively study the frequency-dependent sensitivity of AC elastocaloric effect measurements.
• To develop models that accurately reproduce experimental thermal transfer functions.
• To provide practical guidelines for experimentalists.

Main Methods:

• Application of exactly soluble models to oscillating heat flow.
• Utilization of numerical methods for heat flow analysis.
• Analysis of representative experimental data for Ba(Fe1-xCox)2As2.

Main Results:

• Developed models that capture fine details of thermal transfer functions.
• Established a baseline for comparing the frequency response of the AC elastocaloric technique.
• Provided intuitive explanations for experimental observations.

Conclusions:

• The study offers practical guidelines for AC elastocaloric measurements.
• It establishes a benchmark for evaluating the frequency response of the technique.
• It enhances the understanding of experimental results in elastocaloric measurements.