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http://dx.doi.org/10.5012/jkcs.2005.49.6.560

EPR and Electrical Studies in Layered Na1.9Li0.1Ti3O7 and its Copper Doped Derivatives  

Pal, D. (Department of Physics, P.P.N. College)
Chand, Prem (Department of Physics, Indian Institute of Technology)
Tandon, R.P. (Department of Physics and Astrophysics, Delhi University)
Shripal (Department of Physics, P.P.N. College)
Publication Information
Journal of the Korean Chemical Society / v.49, no.6, 2005 , pp. 560-566 More about this Journal
Abstract
Sintered ceramic samples of pure and some copper doped layered sodium lithium tri-titanate ($Na_{1.9}Li_{0.1}Ti_{3-X}Cu_XO_{7-X}$) materials with different dopant molar percentages (0.0 at $Ti^{4+}$ sites in the lattice is proposed in this paper. Furthermore, three distinct regions have been identified in log(${\sigma}_{d.c.}T$) versus 1000/T plots. The lowest temperature region is attributed to electronic hopping conduction(polaron) for all copper doped derivatives and ionic conduction for lithium substituted $Na_2Ti_3O_7$.The mechanism of conduction in the intermediate region is associated interlayer ionic conduction and in the highest temperature region is associated modified interlayer ionic conduction.
Keywords
Alkali Titanate; Layered Ceramic; EPR; Electronic Hopping Conduction (Polaron); Ionic Conduction;
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