Significant elastocaloric effect in a Fe-31.2Pd (at. %) single crystal

Abstract

A significant elastocaloric effect was detected in a Fe-31.2Pd (at. %) single crystal when a compressive stress was applied in the [001]P direction of the parent phase at temperatures of 240-290 K. The temperature decrease caused by the removal of adiabatic stress was approximately 2 K and the refrigeration capacity was calculated to be 2 MJ/m3 under a stress of 100 MPa. This significant elastocaloric effect over a wide temperature range was caused by the remarkable temperature dependence of the Young's modulus in the [001]P direction.

Barocaloric and magnetocaloric effects inFe49Rh51

“…Materials with giant elastocaloric 18,19 and barocaloric 20,21 effects have also recently been reported.…”

Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

“…4 On one hand, ferroelastic shape memory alloys are most intensively studied and promising elastocaloric materials due to their excellent superelasticity and broad operational temperature window. [5][6][7][8][9] On the other hand, ferroelastic ferroelectric bulk and thin films are predicted to have remarkable elastocaloric properties comparable with ferroelastic martensites, [10][11][12] which further expands the elastocaloric family.…”

“…Note that 6.9 K is indeed in the range of temperature changes for other elastocaloric systems reported in the literature. [2][3][4][5][6][7][8][9][10][11] Moreover, due to the second-order nature of the phase transition, it is expected that the hysteresis loss and irreversibilities associated with latent heat vanish, which is of importance to enhance refrigerant efficiency. 5,12,13 In addition, the system can operate in a wide temperature window for all compressive substrates we investigated (see, e.g., the 60 K FIG.…”

“…13 For instance, it was reported that the hysteresis loss can be lowered in Fe-Pd single crystal exhibiting a second-order like martensitic transition. 6 In addition, as the size of current shape-memory alloys shrinks towards the nano-scale, numerous problems and instabilities arise, including fatigue, micro-cracking, and oxidation. 14 In this regard, ferroelectric thin films may have potential advantages.…”

Elastic Limit of Fe–Pd Alloys Exhibiting Lattice Softening

“…7. In the figure, its value for the Fe-31.2Pd (at.%) alloy in the [001] direction, which is obtained from the stress-strain curve reported previously, 14) is also shown for comparison. We know from Fig.…”