Realization of giant elastocaloric cooling at cryogenic temperatures in TmVO${}_4$ via a strain load/unload technique

Abstract

The adiabatic elastocaloric effect relates changes in the strain that a material experiences to resulting changes in its temperature. While elastocaloric materials have been utilized for cooling in room temperature applications, the use of such materials for cryogenic cooling remains relatively unexplored. Here, we use a strain load/unload technique at low temperatures, similar to those employed at room-temperature, to demonstrate a large cooling effect in TmVO${}_4$. For strain changes of $1.8\cdot 10^{-3}$, the inferred cooling reaches approximately 50% of the material's starting temperature at 5 K, justifying the moniker "giant". Beyond establishing the suitability of this class of material for cryogenic elastocaloric cooling, these measurements also provide additional insight to the entropy landscape in the material as a function of strain and temperature, including the behavior proximate to the quadrupolar phase transition.

References in corpus (9)

• Elastocaloric determination of the phase diagram of Sr${}_2$RuO${}_4$
• Field-tuned ferroquadrupolar quantum phase transition in the insulator TmVO${}_4$
• Second order Zeeman interaction and ferroquadrupolar order in TmVO${}_4$
• Anisotropic nematic fluctuations above the ferroquadrupolar transition in TmVO${}_4$
• Elastocaloric signatures of symmetric and antisymmetric strain-tuning of quadrupolar and magnetic phases in DyB2C2
• Lattice dynamics, crystal-field excitations and quadrupolar fluctuations of YbRu${}_2$Ge${}_2$
• Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator TmVO${}_4$
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• Giant elastocaloric effect at low temperatures in TmVO${}_4$ and implications for cryogenic cooling

Cited by in corpus (1)

• Magnetocalorics of singlet ground state induced moment magnets