Zigzag spin structure in layered honeycomb Li3 Ni2 SbO6

• Verfasst von: Kurbakov, Alexander I. [VerfasserIn]
• Verfasst von: Park, Jaena [VerfasserIn]
• Verfasst von: Koo, Changhyun [VerfasserIn]
• Verfasst von: Klingeler, Rüdiger [VerfasserIn]
• Titel: Zigzag spin structure in layered honeycomb Li3 Ni2 SbO6
• Titelzusatz: a combined diffraction and antiferromagnetic resonance study
• Verf.angabe: A.I. Kurbakov, A.N. Korshunov, S.Yu. Podchezertsev, A.L. Malyshev, M.A. Evstigneeva, F. Damay, J. Park, C. Koo, R. Klingeler, E.A. Zvereva, and V.B. Nalbandyan
• Fussnoten: Die Zahlen 3, 2, 6 sind im Titel tiefgestellt ; Gesehen am 28.03.2018
• Titel Quelle: Enthalten in: Physical review
• Jahr Quelle: 2017
• Band/Heft Quelle: 96(2017,2) Artikel-Nummer 024417, 9 Seiten
• ISSN Quelle: 2469-9969
• DOI: doi:10.1103/PhysRevB.96.024417
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1571495215

Abstract

The magnetic structure of Li3Ni2SbO6 has been determined by low-temperature neutron diffraction, and the crystal structure has been refined by a combination of synchrotron and neutron powder diffraction. The monoclinic (C2/m) symmetry, assigned previously to this pseudohexagonal layered structure, has been unambiguously proven by peak splitting in the synchrotron diffraction pattern. The structure is based on essentially hexagonal honeycomb-ordered Ni2SbO6 layers alternating with Li3 layers, all cations and anions being in an octahedral environment. The compound orders antiferromagnetically below TN=15K, with the magnetic supercell being a 2a×2b multiple of the crystal cell. The magnetic structure within the honeycomb layer consists of zigzag ferromagnetic spin chains coupled antiferromagnetically. The ordered magnetic moment amounts to 1.62(2)μB/Ni, which is slightly lower than the full theoretical value. Upon cooling below TN, the spins tilt from the c axis, with a maximum tilting angle of 15.6∘ at T=1.5K. Our data imply non-negligible ferromagnetic interactions between the honeycomb layers. The observed antiferromagnetic resonance modes are in agreement with the two-sublattice model derived from the neutron data. Orthorhombic anisotropy shows up in zero-field splitting of Δ=198±4 and 218±4GHz. Above TN, the electron spin resonance data imply short-range antiferromagnetic order up to about 80 K.