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ID 31998
file
creator
Deng, Shukang
Saiga, Yuta
Kajisa, Kousuke
NDC
Physics
abstract
Single crystalline samples of type-VIII clathrate Ba_8Ga_<16-x>Cu_xSn_<30> (0 ≤x ≤ 0.033) were prepared by the Sn-flux method. Upon substituting Cu for Ga, the carrier mobility at 300 K increases twice while the carrier density stays in the range 3.1-4.2×10^<19>/cm3. Consequently, the electrical resistivity is decreased from 5.3 mΩcm for x=0 to 3.2 mΩcm for x=0.033. Irrespective of x, the Seebeck coefficient is largely negative and linearly changes with temperature in the range 300<T<600 K. The thermal conductivity is in the range 0.68-0.74 W/Km at 300 K for all samples. The dimensionless figure of merit ZT for x=0.033 reaches the maximum of 1.35 at 540 K.
journal title
Journal of Applied Physics
volume
Volume 109
issue
Issue 10
start page
103704-1
end page
103704-4
date of issued
2011-05-18
publisher
The American Institute of Physics
issn
0021-8979
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2011 American Institute of Physics
relation url
department
Graduate School of Advanced Sciences of Matter