51V-NMR study of low-temperature phase in δ-Ag2/3V2O5. (18th March 2015)

• Record Type: Journal Article
• Authors: Kawasaki, Y; Morioka, R; Kishimoto, Y; Nakamura, K; Nishiyama, K; Koyama, T; Mito, T; Baba, T; Yamauchi, T; Isobe, M; Ueda, Y
• Is Part Of: Journal of physics. Number 592 (2015)
• Page Start: 012042
• Publication Date: 2015-03-18
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/592/1/012042
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 51 V-NMR experiments have been performed to investigate the local magnetic and electronic properties on the phase transition in the mixed-valence oxide δ-Ag2/3 V2 O5 . We have observed the abrupt loss of 51 V-NMR signal coming from the non-magnetic V 5+ -like ions above Tc = 225 K. It indicates that the majority of V ions are magnetic above Tc and that the phase transition is accompanied by the charge separation and charge ordering of 3 d electrons on V sites. In the charge ordered state below Tc, the magnetic V 4+ -like ions are located at both V1 and V2 sites with equal distribution.