Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 4, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4790151
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Funding
- National Natural Science Foundation of China [11174295, 51001094, 9122109, 51171177]
- U. S. Department of Energy [DE-FG02-01ER45927]
- DOE [DE-AC52-06NA25396]
- U.S. Department of Energy (DOE) [DE-FG02-01ER45927] Funding Source: U.S. Department of Energy (DOE)
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The local distortion indicated by the split of the Cu/Sn-Mn bonds for the negative thermal expansion (NTE) materials Cu1-xSnxNMn3 (x = 0.1 and 0.5) was observed using neutron pair distribution function. The distribution of Cu/Sn-Mn bonds upon Sn doping is suggested to be attributable to the fluctuation in the hybridization of Mn d with Sn p orbitals. Accordingly, the antiferromagnetic (AFM) coupling mediated by the p-d hybridization fluctuates in strength. Consequently, the AFM transition closely coupled with the volume change is broadened, leading to the NTE. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790151]
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