1. Co(NO3)2 as an Inverted Umbrella-type Chiral Noncoplanar Ferrimagnet
- Author
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Danilovich, I. L., Deeva, E. B., Bukhteev, K. Y., Vorobyova, A. A., Morozov, I. V., Volkova, O. S., Zvereva, E. A., Maximova, O. V., Solovyev, I. V., Nikolaev, S. A., Phuyal, D., Abdel-Hafiez, M., Wang, Y. C., Lin, J. -Y., Chen, J. M., Gorbunov, D. I., Puzniak, K., Lake, B., and Vasiliev, A. N.
- Subjects
NONCOLLINEAR STRUCTURES ,COBALT NITRATES ,TRIANGULAR MOTIF ,COBALT COMPOUNDS ,SPIN AND ORBITAL CONTRIBUTIONS ,QUANTUM ENTANGLEMENT ,LOW-DIMENSIONAL MAGNETIC SYSTEMS ,SPIN FLUCTUATIONS ,ISING MODEL ,GAUGE STRUCTURE ,FERRIMAGNETISM ,GROUND STATE ,MAGNETIC MOMENTS ,HEISENBERG SYSTEM ,LONG RANGE ORDERS - Abstract
The low-dimensional magnetic systems tend to reveal exotic spin-liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in triangular, honeycomb, or kagome lattices is dictated by the competition of exchange interactions, also being sensitive to anisotropy and the spin value of magnetic ions. While the low-spin Heisenberg systems may arrive to a spin-liquid long-range entangled quantum state with emergent gauge structures, the high-spin Ising systems may establish the rigid noncollinear structures. Here, we present the case of chiral noncoplanar inverted umbrella-type ferrimagnet formed in cobalt nitrate Co(NO3)2 below TC=3K with the comparable spin and orbital contributions to the total magnetic moment. © 2020 American Physical Society. This work has been supported by Russian Scientific Foundation, Grant No. 19-42-02010 and by Russian Foundation for Basic Research (RFBR) Grants No. 18-52-52005, No. 18-502-12022, No. 19-02-00015, and No. 19-03-01059. We acknowledge support by the Russian Ministry of Science and Higher Education, Contracts No. 02.A03.21.0004, No. 02.A03.21.0006, and No. 02.A03.21.0011. O.V.M. and A.N.V. acknowledge support by NUST “MISiS,” Grant No. K2-2020-008. We acknowledge the support of Hochfeld Magnetlabor Dresden at Helmholtz Zentrum Dresden Rossendorf, member of the European Magnetic Field Laboratory (EMFL). B.L. acknowledges the support of DFG through Project No. B06 of SFB 1143 (ID No. 247310070). J.-Y.L. was supported by Taiwan MOST Grant No. 107-2923-M-009-001-MY3 and by the center for Emergent Functional Matter Science of NCTU from the Featured Areas Research Center program within the framework of the Higher education Sprout Project by the Ministry of Education (MOE) in Taiwan. M.A.-H. acknowledges the support from the Swedish Research Council Grant No. (VR) 2018-05339. I.V.S. was supported by Program AAAA-A18-118020190095-4 (Quantum).
- Published
- 2020