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

Journal Article · · Physical Review Letters
 [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)

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; FG02-07ER46384
OSTI ID:
1265995
Alternate ID(s):
OSTI ID: 1235611
Journal Information:
Physical Review Letters, Vol. 116, Issue 3; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

References (29)

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Quantum 120 ° model on pyrochlore lattice: Orbital ordering in MnV 2 O 4 journal March 2010
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Ordering process and ferroelectricity in a spinel derived from FeV 2 O 4 journal February 2012
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Cited By (2)

Spin-Orbital Correlated Dynamics in the Spinel-Type Vanadium Oxide MnV 2 O 4 journal July 2017
A variety of elastic anomalies in orbital-active nearly-itinerant cobalt vanadate spinel text January 2017

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