Published June 2007
| Version v1
Journal article
Anomalous magnetic phase in an undistorted pyrochlore oxide Cd2Os2O7 induced by geometrical frustration
Creators
- 1. High Energy Accelerator Research Organization, Institute of Materials Structure Science, Tsukuba, Ibaraki (Japan)
- 2. Japan Atomic Energy Agency, Advanced Science Research Center, Tokai, Ibaraki (Japan)
- 3. Tokyo Univ., Inst. for Solid State Physics, Kashiwa, Chiba (JP)
Description
We report on the muon spin rotation/relaxation study of a pyrochlore oxide, Cd2Os2O7, which exhibits a metal-insulator (MI) transition at TMI ≅ 225 K without structural phase transition. It reveals strong spin fluctuation (≥108 s-1) below the MI transition, suggesting a predominant role of geometrical spin frustration amongst Os5+ ions. Meanwhile, upon further cooling, an incommensurate spin density wave discontinuously develops below TSDW ≅ 150 K. These observations strongly suggest the occurrence of an anomalous magnetic transition and associated change in the local spin dynamics in undistorted pyrochlore antiferromagnet. (author)
Additional details
Publishing Information
- Journal Title
- Journal of the Physical Society of Japan
- Journal Volume
- 76
- Journal Issue
- 6
- Journal Page Range
- p. 063703.1-063703.4
- ISSN
- 0031-9015
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 39006020
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ANTIFERROMAGNETISM; CADMIUM IONS; ELECTRICAL INSULATORS; ELECTRON CORRELATION; GEOMETRY; MAGNETIC PROPERTIES; MUON SPIN RELAXATION; OSMIUM IONS; OXIDES; PHASE TRANSFORMATIONS; PYROCHLORE; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K
- Descriptors DEC
- CHALCOGENIDES; CHARGED PARTICLES; CORRELATIONS; ELECTRICAL EQUIPMENT; EQUIPMENT; IONS; MAGNETISM; MATHEMATICS; MINERALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RELAXATION; TEMPERATURE RANGE
Optional Information
- Notes
- 21 refs., 4 figs.