51V-NMR study of low-temperature phase in δ-Ag2/3V2O5

International Conference on Strongly Correlated Electron Systems 2014

Kawasaki, Y.^1 ; Morioka, R.^1 ; Kishimoto, Y.^1 ; Nakamura, K.^1 ; Nishiyama, K.^2 ; Koyama, T.^2 ; Mito, T.^2 ; Baba, T.^3 ; Yamauchi, T.^3 ; Isobe, M.^3,4 ; Ueda, Y.^3,5

Institute of Technology and Science, Tokushima University, Tokushima

770-8506, Japan^1

Graduate School of Material Science, University of Hyogo, Hyogo

678-1297, Japan^2

Institute for Solid State Physics, University of Tokyo, Kashiwa

277-8581, Japan^3

Max Planck Institute for Solid State Research, Stuttgart

D-70569, Germany^4

Toyota Physical and Chemical Research Institute, Nagakute, Aichi

480-1192, Japan^5

关键词: 3d electron;    Charge ordered state;    Charge ordering;    Charge separations;    Low temperature phase;    Magnetic and electronic properties;    Mixed valence;    Nonmagnetics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012042/pdf
DOI  :  10.1088/1742-6596/592/1/012042

来源: IOP

【 摘 要 】

51V-NMR experiments have been performed to investigate the local magnetic and electronic properties on the phase transition in the mixed-valence oxide δ-Ag2/3V2O5. We have observed the abrupt loss of51V-NMR signal coming from the non-magnetic V5+-like ions above Tc225 K. It indicates that the majority of V ions are magnetic above Tcand that the phase transition is accompanied by the charge separation and charge ordering of 3d electrons on V sites. In the charge ordered state below Tc, the magnetic V4+-like ions are located at both V1 and V2 sites with equal distribution.