ID 112415
Author
Morioka, R. Tokushima University
Nishiyama, K. University of Hyogo
Koyama, T. University of Hyogo
Mito, T. University of Hyogo
Baba, T. University of Tokyo
Yamauchi, T. University of Tokyo
Isobe, M. Max Planck Institute for Solid State Research
Ueda, Y. Toyota Physical and Chemical Research Institute
Content Type
Journal Article
Description
51V-NMR experiments have been performed to investigate the local magnetic and electronic properties of the mixed-valence oxide δ-Ag2/3V2O5, which shows the novel V4+/V5+ charge ordering trigged by Ag ion ordering. We have observed the abrupt loss of 51V-NMR signal coming from the non-magnetic V5+-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 the charge ordering of 3d electrons on V sites. In the low-temperature phase below Tc, the nuclear spin-lattice relaxation rate 1/T1 shows the thermal activation-type temperature dependence with the activation energy of about 130 K. It has been clarified that the ground state of this material is the charge ordered one with the spin singlet of 3d electrons on V4+-V4+ pair from a microscopic point of view.
Journal Title
Journal of Physics: Conference Series
ISSN
17426596
17426588
NCID
AA12839617
Publisher
IOP Publishing
Volume
807
Start Page
062001
Published Date
2017-04-06
Rights
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Science and Technology