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Title: Magnetic Frustration Driven by Itinerancy in Spinel CoV2O4

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [4];  [1]; ORCiD logo [4];  [1];  [5];  [6];  [7];  [4];  [6]
  1. Ulsan National Inst. of Science and Technology (Republic of Korea). School of Energy and Chemical Engineering
  2. Shanghai Jiao Tong Univ. (China). Dept. of Physics and Astronomy and Key Laboratory of Artificial Structures and Quantum Control
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Data Analysis and Visualization Div. and Quantum Condensed Matter Div.
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Div.
  5. Korea Inst. of Science and Technology Information (KISTI), Daejeon (Republic of Korea). Dept. of Applied Research and Network R&D
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  7. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

Localized spins and itinerant electrons rarely coexist in geometrically-frustrated spinel lattices. They exhibit a complex interplay between localized spins and itinerant electrons. In this paper, we study the origin of the unusual spin structure of the spinel CoV2O4, which stands at the crossover from insulating to itinerant behavior using the first principle calculation and neutron diffraction measurement. In contrast to the expected paramagnetism, localized spins supported by enhanced exchange couplings are frustrated by the effects of delocalized electrons. This frustration produces a non-collinear spin state even without orbital orderings and may be responsible for macroscopic spin-glass behavior. Competing phases can be uncovered by external perturbations such as pressure or magnetic field, which enhances the frustration.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Contributing Organization:
Ulsan National Inst. of Science and Technology (Republic of Korea). School of Energy and Chemical Engineering
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725
OSTI ID:
1490821
Alternate ID(s):
OSTI ID: 1509594
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (1)

Enhanced orbital fluctuations in Mg-doped Mn V 2 O 4 single crystals journal December 2019

Figures / Tables (5)


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