DOPING EFFECTS IN AV(2)O(5) (A = LI, NA AND CA)

Authors
Citation
M. Isobe et Y. Ueda, DOPING EFFECTS IN AV(2)O(5) (A = LI, NA AND CA), Journal of magnetism and magnetic materials, 177, 1998, pp. 671-672
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science","Physics, Condensed Matter
ISSN journal
0304-8853
Volume
177
Year of publication
1998
Part
1
Pages
671 - 672
Database
ISI
SICI code
0304-8853(1998)177:<671:DEIA(=>2.0.ZU;2-T
Abstract
The doping effects on the electric and magnetic properties in AV(2)O(5 ) (A = Li, Na and Ca) have been investigated. In all these compounds, the Curie-like increase of magnetic susceptibility at low temperature was observed on increasing the Na(Li)-deficiency in NaV2O5(LiV2O5) or Ti-substitution in CaV2O5, although no long-range magnetic order has e ver appeared. In NaxV2O5, the spin-Peierls transition is suppressed by Na-deficiency and vanishes around x = 0.97. The conductivity in NaxV2 O5 and LixV2O5 increased with doping level. The temperature dependence of conductivity in NaxV2O5 is consistent with variable range hopping in quasi-one-dimensional system, while LiV2O5 shows an activation type behavior with E-a approximate to 0.3 eV in the temperature dependence of resistivity. (C) 1998 Elsevier Science B.V. All rights reserved.