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Giant reversible barocaloric effect with low hysteresis in antiperovskite PdNMn3 compound.
- Source :
-
Scripta Materialia . Oct2021, Vol. 203, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Barocaloric (BC) refrigeration is a new type of clean and energy-efficiency refrigeration technology. However, the giant and colossal BC effects are mainly based on the first-order phase transitions, leading to the unfavorable hysteresis. Here we report the giant BC effect along with weak hysteresis at the antiferromagnetic (AFM) to paramagnetic (PM) phase transition (T N = 283 K) in antiperovskite PdNMn 3 compound. The reversible isothermal entropy change reaches 28.3 J kg−1 K−1 under 290 MPa. The hysteresis is only about 2 K, which is associated with a small volumetric change Δ V/V at T N (~0.2%). The magnetic entropy is proposed to mainly contribute to the entropy change at T N , which compensates for the reduced lattice contribution due to the small Δ V/V. Our result demonstrates the possibility of realizing giant BC effect together with weak hysteresis in materials where both crystallographic and non-crystallographic entropy changes cooperate at the first-order phase transition (FOPT). [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 203
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 151629913
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2021.114049