Abstract In quasi-one-dimensional conductor β-Na.33V2O5, the commensurate C.D.W.(dimerization) phase transition about 180 K was found by the magnetic resonance and X ray diffuse scattering studies. The pair formation of magnetic V4+ ions in site I chain has been discussed on the basis of the spin-lattice relaxation time of 23Na and 51V nuclei and the anisotropic EPR line width. In case of β-LixV2O5 (x=0.36), the interesting two phase transitions were observed, 1) the incommensurate C.D.W. phase appears about 220 K, 2) below 170 K, this C.D.W. phase (qb=0.53) splits two sublattice of the commensurate C.D.W. phase (qb=0.5) and the I.C.C.D.W. phase (qb=0.57). The magnetic resonance studies of the single crystals of β-LixV2O5 show that there occur the microscopic changes of the electronic structure corresponding to these phase transitions.
[1]
H. Nagasawa,et al.
NMR relaxation studies on quasi-one-dimensional conductor β-Na0.33V2O5
,
1981
.
[2]
K. Maruyama,et al.
NMR Studies of Quasi-One-Dimensional Conductor β-Na0.33V2O5
,
1980
.
[3]
H. Kobayashi.
Electrical Properties of a One-dimensional Conductor, NaxV2O5
,
1979
.
[4]
R. Wallis,et al.
Anisotropic conductivity of the vanadium bronze Na0.33V2O5
,
1977
.
[5]
J. Galy.
Structure of the MxV2O5- and MxV2-yTyO5- phases
,
1970
.
[6]
M. Sienko,et al.
MAGNETIC RESONANCE STUDIES OF LITHIUM VANADIUM BRONZE
,
1962
.