CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
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
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume107Issue:13Pages:
Subtype期刊文献
AbstractNanocrystalline 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.
KeywordAntiperovskite Manganese Nitride Window
Indexed BySCI
Language英语
WOS IDWOS:000362575600017
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24936
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorLin, JC (reprint author), Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China.
Recommended Citation
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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