Comparative analysis of elastocaloric and barocaloric effects in single-crystal and ceramic ferroelectric (NH4)2SO4. (15th January 2021)

• Record Type: Journal Article
• Authors: Mikhaleva, Ekaterina; Gorev, Mikhail; Bondarev, Vitaly; Bogdanov, Evgeny; Flerov, Igor
• Is Part Of: Scripta materialia. Number 191(2021)
• Page Start: 149
• Page End: 154
• Publication Date: 2021-01-15
• Subjects: Polymorphic phase transformation -- Phase diagram -- Order–disorder phenomena -- Entropy -- Caloric effects; 62.50.-p -- 65.40.Ba -- 65.40.De -- 81.30.-t; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.09.030
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report the influence of anisotropy and texture on elasto(ElCE)- and baro(BCE)-caloric effects in single-crystal and ceramic (NH4 )2 SO4 . Inverse extensive and intensive ElCE in ceramics, (ΔSElCE )cer = 87 J/kg·K; ΔTAD = - 11.6 K), as well as in a single crystal along the ferroelectric axis a, (ΔSElCE )a = 115 J/kg·K; (ΔTAD )a = - 16 K, significantly exceed BCE, ΔSBCE = 75 J/kg·K; ΔTAD = - 9.8 K, even at low pressure ~ 0.3 GPa. Caloric parameters of ammonium sulphate are comparable with those for promising solid-state refrigerants. Graphical abstract: Image, graphical abstract