Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.341, 1075-1080, 2000
Physical properties of vanadium oxide bronzes beta-A(0.33)V(2)O(5) (A = Ca and Sr)
The vanadium bronzes, beta-A(0.33)V(2)O(5) (A = Ca and Sr) have been synthesized, and their electromagnetic properties investigated, They show phase transitions at 150K and 170K, respectively, accompanying with anomalies in the magnetic susceptibility and resistivity curves. These transitions are of charge order type. Below the transition temperature the magnetic susceptibility showed low dimensional behavior in both compounds, especially spin gap behavior in Sr0.33V2O5. Such behavior is closely related to the crystal structure characteristic of the vanadium beta-bronzes and a manner or ordering for magnetic V4+ ions at the transition.