Magnetic Frustration Driven by Itinerancy in Spinel CoV2O4
- Ulsan National Inst. of Science and Technology (Republic of Korea). School of Energy and Chemical Engineering
- Shanghai Jiao Tong Univ. (China). Dept. of Physics and Astronomy and Key Laboratory of Artificial Structures and Quantum Control
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Data Analysis and Visualization Div. and Quantum Condensed Matter Div.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Div.
- Korea Inst. of Science and Technology Information (KISTI), Daejeon (Republic of Korea). Dept. of Applied Research and Network R&D
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- 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
Web of Science
Enhanced orbital fluctuations in Mg-doped single crystals
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journal | December 2019 |
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