Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Daoyong Cong
  • Wenxin Xiong
  • Antoni Planes
  • Lluís Mañosa
  • Peiyu Cao
  • Zhihua Nie
  • Xiaoming Sun
  • Zhi Yang
  • Xiufeng Hong
  • Yandong Wang

Detail(s)

Original languageEnglish
Article number255703
Journal / PublicationPhysical Review Letters
Volume122
Issue number25
Online published26 Jun 2019
Publication statusPublished - 28 Jun 2019
Externally publishedYes

Abstract

Energy-efficient and environment-friendly elastocaloric refrigeration, which is a promising replacement of the conventional vapor-compression refrigeration, requires extraordinary elastocaloric properties. Hitherto the largest elastocaloric effect is obtained in small-size films and wires of the prototype NiTi system. Here, we report a colossal elastocaloric effect, well exceeding that of NiTi alloys, in a class of bulk polycrystalline NiMn-based materials designed with the criterion of simultaneously having large volume change across phase transition and good mechanical properties. The reversible adiabatic temperature change reaches a strikingly high value of 31.5 K and the isothermal entropy change is as large as 45 J kg-1 K-1. The achievement of such a colossal elastocaloric effect in bulk polycrystalline materials should push a significant step forward towards large-scale elastocaloric refrigeration applications. Moreover, our design strategy may inspire the discovery of giant caloric effects in a broad range of ferroelastic materials.

Citation Format(s)

Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys. / Cong, Daoyong; Xiong, Wenxin; Planes, Antoni et al.
In: Physical Review Letters, Vol. 122, No. 25, 255703, 28.06.2019.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review