Low-pressure-induced large barocaloric effect in MnAs0.94Sb0.06 alloy around room temperature

Cheng, Peng-Tao; Zhang, Zhao; Kan, Xu-Cai; Zhang, Cheng-Liang; Zhang, Zheng-Ming; Li, Bing; Wang, Dun-Hui

doi:10.1007/s12598-023-02374-1

Rare Met.

2023

DOI: 10.1007/s12598-023-02374-1

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Low-pressure-induced large barocaloric effect in MnAs0.94Sb0.06 alloy around room temperature

Peng-Tao Cheng,

Zhao Zhang,

Xu-Cai Kan

et al.

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2024

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Cited by 3 publications

References 47 publications

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Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded (MnCoGe)0.96(CuCoSn)0.04 composite

Kuang,

Tao,

Yang

et al. 2024

Int J Miner Metall Mater

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Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded (MnCoGe)0.96(CuCoSn)0.04 composite

Kuang,

Tao,

Yang

et al. 2024

Int J Miner Metall Mater

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Multi-field synergistic regulation enhanced multicaloric effect in all-d-metal Ni37Co13Mn35Ti15 alloy

Yu,

Liu,

Liang

et al. 2024

Journal of Alloys and Compounds

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Colossal barocaloric effect of the spin-crossover compound {Fe(pz)2(BH3CN)2} near room temperature

Li,

Zhang,

Bibik

et al. 2024

Applied Physics Letters

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As one of the most likely alternatives to traditional vapor compression refrigeration technology, solid refrigeration technology based on the barocaloric effect (BCE) has attracted extensive attention in recent years. Spin-crossover (SCO) compounds are considered suitable for working at low driving pressures due to high-pressure sensitivity and small hysteresis width. However, the entropy change (ΔSSCO) of the SCO compound is smaller than that of other excellent barocaloric materials (plastic crystals and two-dimensional perovskites). Here, we report the BCE of the SCO compound {Fe(pz)2(BH3CN)2} (pz = pyrazine) with a smaller molar mass and a third source of entropy change besides electron and vibrational entropy changes. Compound {Fe(pz)2(BH3CN)2} exhibits high pressure sensitivity (dT1/2dP= 20.2 K kbar−1) as well as entropy change (ΔSSCO= 202 J kg−1 K−1). The maximum values of reversible isothermal entropy change (ΔSit,rev,max) and adiabatic temperature change (ΔTad,rev,max) at 1 kbar are only 103 J kg−1 K−1 and ∼0 K, respectively, due to the hysteresis behavior. However, at sufficiently high driving pressures, ΔSit,rev,max exceeds 200 J kg−1 K−1, and ΔTad,rev,max can reach ∼47 K, which exceeds all SCO compounds reported in BCE studies and is comparable to some plastic-crystalline and two-dimensional perovskite barocaloric materials. The excellent BCE of the SCO compound {Fe(pz)2(BH3CN)2} is mainly due to its small molar mass, which makes the unit mass compound exhibit higher ΔSSCO, while the introduction of the third source of entropy change—the reorientation entropy change (ΔSreo), only plays a small role. This is expected to promote the practical application of SCO compounds as barocaloric refrigerants.

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Low-pressure-induced large barocaloric effect in MnAs0.94Sb0.06 alloy around room temperature

Cited by 3 publications

References 47 publications

Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded (MnCoGe)0.96(CuCoSn)0.04 composite

Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded (MnCoGe)0.96(CuCoSn)0.04 composite

Multi-field synergistic regulation enhanced multicaloric effect in all-d-metal Ni37Co13Mn35Ti15 alloy

Colossal barocaloric effect of the spin-crossover compound {Fe(pz)2(BH3CN)2} near room temperature

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