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Local atomic structures and lattice dynamics of inverse colossal barocaloric ammonium thiocyanate

文献类型：期刊论文

作者Zhang, Zhe1,2; Gong, Wu3; Zhao, Xueting1,2; Qi, Ji1,2; Li, Mingze1,2; Torii, Shuki4; Chen, Huaican5,6; Yin, Wen5,6; Ohara, Koji7; Zhang, Zhidong1,2
刊名PHYSICAL REVIEW MATERIALS
出版日期2023-12-20
卷号7期号:12页码:9
ISSN号2475-9953
DOI10.1103/PhysRevMaterials.7.125402
通讯作者Kawakita, Yukinobu(yukinobu.kawakita@j-parc.jp) ; Li, Bing(bingli@imr.ac.cn)
英文摘要NH4SCN exhibits successive phase transitions from monoclinic to orthorhombic, and then to tetragonal. The former phase transition is accompanied by an inverse colossal barocaloric effect and a huge negative thermal expansion. This transition is complicated by the possibly coexisting orientational disorder of NH4+ and SCN-, and the mechanism is still unclear. Here, NH4SCN is investigated using high-resolution neutron powder diffraction, pair distribution function analysis, and Raman scattering. Both the average and local structural analyses indicate that only NH4+ is orientationally disordered in the orthorhombic phase, and SCN- becomes subsequently disordered in the tetragonal phase. Both temperature-induced and pressure-induced hardening behaviors of SCN--related vibrations are observed, which lead to the breakage of hydrogen bonds-linked NH4+ with SCN- and further facilitate phase transition. Our findings provide a solid standing point of atomic structures and dynamics on which the scenario of the phase transition and the associated physical properties are established.
资助项目Young Innovation Talent Program of Shenyang[RC210432] ; National Natural Science Foundation of China[11934007] ; National Natural Science Foundation of China[2020B0093] ; National Natural Science Foundation of China[P1621090400001]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001133933900002
出版者AMER PHYSICAL SOC
资助机构Young Innovation Talent Program of Shenyang ; National Natural Science Foundation of China
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Kawakita, Yukinobu; Li, Bing
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
3.Japan Atom Energy Agcy, J PARC Ctr, Tokai, Ibaraki 3191195, Japan
4.High Energy Accelerator Res Org, Inst Mat Struct Sci, Tokai, Ibaraki 3191106, Japan
5.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
6.Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
7.Japan Synchrotron Radiat Res Inst, Diffract & Scattering Div, SPring 8, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
推荐引用方式
GB/T 7714		 Zhang, Zhe,Gong, Wu,Zhao, Xueting,et al. Local atomic structures and lattice dynamics of inverse colossal barocaloric ammonium thiocyanate[J]. PHYSICAL REVIEW MATERIALS,2023,7(12):9.
APA Zhang, Zhe.,Gong, Wu.,Zhao, Xueting.,Qi, Ji.,Li, Mingze.,...&Li, Bing.(2023).Local atomic structures and lattice dynamics of inverse colossal barocaloric ammonium thiocyanate.PHYSICAL REVIEW MATERIALS,7(12),9.
MLA Zhang, Zhe,et al."Local atomic structures and lattice dynamics of inverse colossal barocaloric ammonium thiocyanate".PHYSICAL REVIEW MATERIALS 7.12(2023):9.

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来源：金属研究所

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