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This content will become publicly available on January 19, 2017

Title: Orbital glass state of the nearly metallic spinel cobalt vanadate

Strain, magnetization, dielectric relaxation, and unpolarized and polarized neutron diffraction measurements were performed to study the magnetic and structural properties of spinel Co1–xV2+xO4. The strain measurement indicates that, upon cooling, ΔL/L in the order of ~10–4 starts increasing below TC, becomes maximum at Tmax, and then decreases and changes its sign at T*. Neutron measurements indicate that a collinear ferrimagnetic order develops below TC and upon further cooling noncollinear ferrimagnetic ordering occurs below Tmax. At low temperatures, the dielectric constant exhibits a frequency dependence, indicating slow dynamics. Lastly, these results indicate the existence of an orbital glassy state at low temperatures in this nearly metallic frustrated magnet.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [2] ;  [1]
  1. Waseda Univ., Tokyo (Japan)
  2. Univ. of Virginia, Charlottesville, VA (United States)
  3. Helmholtz-Zentrum fur Materialien und Energie, Berlin (Germany)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Sophia Univ., Tokyo (Japan)
Publication Date:
OSTI Identifier:
1265995
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 3; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English