Pressure dependence of phase transitions in the quasi-one-dimensional metal-insulator transition system β-Na 1/3 V 2 O 5
Pressure dependence of phase transitions in the quasi-one-dimensional metal-insulator transition system β-Na 1/3 V 2 O 5
复制标题
准一维金属-绝缘体转变体系β-Na 1/3 V 2 O 5 中相变的压力依赖性
DOI：
10.1103/physrevb.66.085117
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Horn
中科院分区：
文献类型：
--
作者：
G. Obermeier;D. Ciesla;S. Klimm;S. Horn
The pressure dependence of phase transitions in the quasi-one-dimensional vanadium oxide $\ensuremath{\beta}\ensuremath{-}{\mathrm{Na}}_{1/3}{\mathrm{V}}_{2}{\mathrm{O}}_{5}$ has been studied by magnetic susceptibility and electrical resistivity measurements. The pressure dependence of the various transition temperatures is quite different. The transition at $T=240 \mathrm{K},$ previously reported and attributed to ordering on Na sites, and a second transition at $T\ensuremath{\approx}222 \mathrm{K},$ reported here and attributed to a further increase of order on Na sites, are almost independent of pressure. On the other hand, the metal-insulator (MI) transition at ${T}_{\mathrm{MI}}=130 \mathrm{K}$ shifts to lower temperatures, while the magnetic transition at ${T}_{N}=24 \mathrm{K}$ shifts to higher temperatures with increasing pressure. We discuss the different pressure dependencies of ${T}_{\mathrm{MI}}$ and ${T}_{N}$ in terms of increasing interchain coupling and the MI transition to be of Peierls type.
The pressure dependence of phase transitions in the quasi-one-dimensional vanadium oxide $\ensuremath{\beta}\ensuremath{-}{\mathrm{Na}}_{1/3}{\mathrm{V}}_{2}{\mathrm{O}}_{5}$ has been studied by magnetic susceptibility and electrical resistivity measurements. The pressure dependence of the various transition temperatures is quite different. The transition at $T=240 \mathrm{K},$ previously reported and attributed to ordering on Na sites, and a second transition at $T\ensuremath{\approx}222 \mathrm{K},$ reported here and attributed to a further increase of order on Na sites, are almost independent of pressure. On the other hand, the metal-insulator (MI) transition at ${T}_{\mathrm{MI}}=130 \mathrm{K}$ shifts to lower temperatures, while the magnetic transition at ${T}_{N}=24 \mathrm{K}$ shifts to higher temperatures with increasing pressure. We discuss the different pressure dependencies of ${T}_{\mathrm{MI}}$ and ${T}_{N}$ in terms of increasing interchain coupling and the MI transition to be of Peierls type.