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  4. 中科院固体物理研究所
Anomalous low-temperature heat capacity in antiperovskite compounds

文献类型：期刊论文

作者Guo, Xin-Ge1,2; Lin, Jian-Chao1; Tong, Peng1; Lin, Shuai1; Yang, Cheng1; Lu, Wen-Jian1; Song, Wen-Hai1; Sun, Yu-Ping1,3,4
刊名CHINESE PHYSICS B
出版日期2017-02-01
卷号26期号:2页码:1-5
关键词Low-temperature Heat Capacity Low-energy Phonon Modes Antiperovskite Compound Negative Thermal Expansion
DOI10.1088/1674-1056/26/2/026501
文献子类Article
英文摘要The low-temperature heat capacities are studied for antiperovskite compounds AXM(3) (A = Al, Ga, Cu, Ag, Sn, X = C, N, M = Mn, Fe, Co). A large peak in (C-gamma T)/T-3 versus T is observed for each of a total of 18 compounds investigated, indicating an existence of low-energy phonon mode unexpected by Debye T-3 law. Such a peak is insensitive to the external magnetic field up to 80 kOe (1 Oe = 79.5775 A.m(1)). For compounds with smaller lattice constant, the peak shifts towards higher temperatures with a reduction of peak height. This abnormal peak in (C-gamma T)/T-3 versus T of antiperovskite compound may result from the strongly dispersive acoustic branch due to the heavier A atoms and the optical-like mode from the dynamic rotation of XM6 octahedron. Such a low-energy phonon mode may not contribute negatively to the normal thermal expansion in AXM(3) compounds, while it is usually concomitant with negative thermal expansion in open-structure material (e.g., ZrW2O8, ScF3).
WOS关键词NEGATIVE THERMAL-EXPANSION ; BOSON PEAK ; ORIGIN ; ZRW2O8 ; RESISTIVITY ; COEFFICIENT ; SPECTRUM ; GLASSES ; SCF3
WOS研究方向Physics
语种英语
WOS记录号WOS:000402249000001
资助机构National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Key Basic Research Program of China(2011CBA00111) ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; National Natural Science Foundation of China(51322105 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; U1632158 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301165 ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167) ; 51301167)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/31912]  
专题合肥物质科学研究院_中科院固体物理研究所
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China
4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Xin-Ge,Lin, Jian-Chao,Tong, Peng,et al. Anomalous low-temperature heat capacity in antiperovskite compounds[J]. CHINESE PHYSICS B,2017,26(2):1-5.
APA Guo, Xin-Ge.,Lin, Jian-Chao.,Tong, Peng.,Lin, Shuai.,Yang, Cheng.,...&Sun, Yu-Ping.(2017).Anomalous low-temperature heat capacity in antiperovskite compounds.CHINESE PHYSICS B,26(2),1-5.
MLA Guo, Xin-Ge,et al."Anomalous low-temperature heat capacity in antiperovskite compounds".CHINESE PHYSICS B 26.2(2017):1-5.

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来源：合肥物质科学研究院

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