ISSN:
1432-0630
Keywords:
66.30
;
72.20
;
82.45
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract The ionic and electronic conductivities of Ag2Tl6I10 single crystals have been studied as a function of crystallographic orientation and temperature from 20 to 135°C. EMF as well as AC and DC techniques have been employed. The highly anisotropic material is predominantly an Ag+-ion conductor parallel toc-direction, with the Ag+ ions moving through linear channels that are not interconnected. The conductivity σ‖c =1.6×10−7Ω−1cm−1 at 25°C, with an activation enthalpy for σ‖c of 0.38 eV. The conduction perpendicular toc-direction has been found to be predominantly electronic with a value of σ⊥c =3×10−9Ω−1cm−1 at 25°C and an activation enthalpy for σ⊥c of 0.64 eV. This is the first observation of one-dimensional Ag+ conduction and this type of orientation-dependent change from ionic to electronic conduction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00886951
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