Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3

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	Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3
	Lin, JC; Tong, P; Zhou, XJ; Lin, H; Ding, YW; Bai, YX; Chen, L; Guo, XG; Yang, C; Song, B; Wu, Y; Lin, S; Song, WH; Sun, YP; Lin, JC (reprint author), Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China.
	2015
发表期刊	APPLIED PHYSICS LETTERS
ISSN	0003-6951
卷号	107 期号:13 页码:—
文章类型	期刊文献
摘要	Nanocrystalline antiperovskite GaNxMn3 powders were prepared by mechanically milling. The micrograin GaNxMn3 exhibits an abrupt volume contraction at the antiferromagnetic (AFM) to paramagnetic (PM) (AFM-PM) transition. The temperature window of volume contraction (Delta T) is broadened to 50 K as the average grain size (< D >) is reduced to similar to 30 nm. The corresponding coefficient of linear thermal expansion (alpha) reaches similar to -70 ppm/K, which are comparable to those of giant NTE materials. Further reducing < D > to similar to 10 nm, Delta T exceeds 100K and alpha remains as large as -30 ppm/K (-21 ppm/K) for x = 1.0 (x = 0.9). Excess atomic displacements together with the reduced structural coherence, revealed by high-energy X-ray pair distribution functions, are suggested to delay the AFM-PM transition. By controlling < D >, giant NTE may also be achievable in other materials with large lattice contraction due to electronic or magnetic phase transitions. (C) 2015 AIP Publishing LLC.
关键词	Antiperovskite Manganese Nitride Window
收录类别	SCI
语种	英语
WOS记录号	WOS:000362575600017
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/24936
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Lin, JC (reprint author), Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China.
推荐引用方式 GB/T 7714	Lin, JC,Tong, P,Zhou, XJ,et al. Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3[J]. APPLIED PHYSICS LETTERS,2015,107(13):—.
APA	Lin, JC.,Tong, P.,Zhou, XJ.,Lin, H.,Ding, YW.,...&Lin, JC .(2015).Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3.APPLIED PHYSICS LETTERS,107(13),—.
MLA	Lin, JC,et al."Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3".APPLIED PHYSICS LETTERS 107.13(2015):—.

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