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Sökning: WFRF:(Nikolaev N.) > (2020-2023)

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  • Salamatin, D. A., et al. (författare)
  • The new high-pressure hexagonal Laves phase of the YbZn2 compound
  • 2023
  • Ingår i: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388. ; 946
  • Tidskriftsartikel (refereegranskat)abstract
    • The new metastable high-pressure high-temperature synthesized hexagonal Laves phase compound YbZn2 was investigated. The unit cell parameters, low-temperature Sommerfeld coefficient and Debye temperature were determined. X-ray absorption studies and calculations based on dynamical mean-field theory (DMFT) showed the intermediate valence behavior of YbZn2 with mean Yb valence about 2.55. The values of hyperfine electric parameters in Zn (6h) sites were determined by means of 111Cd-time differential perturbed angular correlations and theoretical density functional calculations. DMFT calculations showed that the main contribution to the electron density of states at the Fermi level is due to Yb 4f electrons, while Zn spd electrons lie much lower in energy.
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3.
  • Danilovich, I. L., et al. (författare)
  • Co(NO3)(2) as an inverted umbrella-type chiral noncoplanar ferrimagnet
  • 2020
  • Ingår i: Physical Review B. - : AMER PHYSICAL SOC. - 2469-9950 .- 2469-9969. ; 102:9
  • Tidskriftsartikel (refereegranskat)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 T-C = 3 K with the comparable spin and orbital contributions to the total magnetic moment.
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