Mark P. Zic, Linda Ye, Maya H. Martinez, Ian R. Fisher
{"title":"Realization of giant elastocaloric cooling at cryogenic temperatures in TmVO$_4$ via a strain load/unload technique","authors":"Mark P. Zic, Linda Ye, Maya H. Martinez, Ian R. Fisher","doi":"arxiv-2409.06909","DOIUrl":null,"url":null,"abstract":"The adiabatic elastocaloric effect relates changes in the strain that a\nmaterial experiences to resulting changes in its temperature. While\nelastocaloric materials have been utilized for cooling in room temperature\napplications, the use of such materials for cryogenic cooling remains\nrelatively unexplored. Here, we use a strain load/unload technique at low\ntemperatures, similar to those employed at room-temperature, to demonstrate a\nlarge cooling effect in TmVO$_4$. For strain changes of $1.8 \\cdot 10^{-3}$,\nthe inferred cooling reaches approximately 50% of the material's starting\ntemperature at 5 K, justifying the moniker \"giant\". Beyond establishing the\nsuitability of this class of material for cryogenic elastocaloric cooling,\nthese measurements also provide additional insight to the entropy landscape in\nthe material as a function of strain and temperature, including the behavior\nproximate to the quadrupolar phase transition.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.06909","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
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.