Mixed oxides of sodium, antimony (5+) and divalent metals (Ni, Co, Zn or Mg)

Politaev, V.V.; Nalbandyan, V. B.; Петренко, А.А.; Shukaev, Igor L.; Волочаев, В. А.; Medvedev, B.S.

doi:10.1016/j.jssc.2009.12.002

Cited by 70 publications

(104 citation statements)

References 28 publications

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“…Basic magnetic properties of Li 3 Ni 2 SbO 6 and Na 3 Ni 2 SbO 6 have been reported recently [17,20,22], but a systematic analysis of their electronic and magnetic behavior is missing. Ordered structure of Li 3 Ni 2 SbO 6 was refined in the space group C2/m [20].…”

Section: Fig 1 2d Honeycomb-latticementioning

confidence: 99%

“…For Na 3 Ni 2 SbO 6 , the initial structure determination was complicated by multiple stacking faults. Nevertheless, it was unambiguously shown that the general layout of the structure is the same as in Li 3 Ni 2 SbO 6 [22,17]. Therefore, our analysis of magnetic interactions was based on a C2/m model constructed on lattice parameters and ionic radii sums.…”

Section: Fig 1 2d Honeycomb-latticementioning

confidence: 99%

“…20,22. Their phase purity was verified by powder X-ray diffraction (ICDD PDF 00-53-0344 and 00-63-566).…”

Section: Experimental and Calculation Detailsmentioning

confidence: 99%

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Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

et al. 2015

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We present a comprehensive experimental and theoretical study of the electronic and magnetic properties of two quasi-two-dimensional (2D) honeycomb-lattice monoclinic compounds A 3 Ni 2 SbO 6 (A=Li, Na). Magnetic susceptibility and specific heat data are consistent with the onset of antiferromagnetic (AFM) long range order at low temperatures with Néel temperatures ~ 14 and 16 K for Li 3 Ni 2 SbO 6 and Na 3 Ni 2 SbO 6 , respectively. The effective magnetic moments of 4.3  B /f.u. (Li 3 Ni 2 SbO 6 ) and 4.4  B /f.u. (Na 3 Ni 2 SbO 6 ) indicate that Ni 2+ is in a high-spin configuration (S=1). The temperature dependence of the inverse magnetic susceptibility follows the Curie-Weiss law in the high-temperature region and shows positive values of the Weiss temperature ~ 8 K (Li 3 Ni 2 SbO 6 ) and ~12 K (Na 3 Ni 2 SbO 6 ) pointing to the presence of nonnegligible ferromagnetic interactions, although the system orders AFM at low temperatures. In addition, the magnetization curves reveal a field-induced (spin-flop type) transition below T N that can be related to the magnetocrystalline anisotropy in these systems. These observations are in agreement with density functional theory calculations, which show that both antiferromagnetic and ferromagnetic intralayer spin exchange couplings between Ni 2+ ions are present in the honeycomb planes supporting a zigzag antiferromagnetic ground state. Based on our experimental measurements and theoretical calculations we propose magnetic phase diagrams for the two compounds. 75.30.Kz; 75.10.Dg; 75.30.Gw; 75.30.Et

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Section: Fig 1 2d Honeycomb-latticementioning

confidence: 99%

Section: Fig 1 2d Honeycomb-latticementioning

confidence: 99%

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Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

et al. 2015

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“…In the family of silver delafossites, 19 superstructures are known now [31,[42][43][44][45][46][47][48][49][50][51][52][53], although structural characterization for 18 of them is incomplete or doubtful due to stacking faults (for details, see [53]. The delafossite Ag 3 LiRu 2 O 6 was declared as a promising candidate for thermoelectric applications due to the combination of two-dimensionality, good conductivity and stacking disorder that is likely to correlate with low thermal conductivity [47].…”

Section: Introductionmentioning

confidence: 99%

Orbitally induced hierarchy of exchange interactions in the zigzag antiferromagnetic state of honeycomb silver delafossite Ag₃Co₂SbO₆

et al. 2016

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We report the revised crystal structure, static and dynamic magnetic properties of quasi-two dimensional honeycomb-lattice silver delafossite Ag 3 Co 2 SbO 6 . The magnetic susceptibility and specific heat data are consistent with the onset of antiferromagnetic long range order at low temperatures with Néel temperature T N ~ 21.2 K. In addition, the magnetization curves revealed a field-induced (spin-flop type) transition below T N in moderate magnetic fields. The GGA+U calculations show the importance of the orbital degrees of freedom, which maintain a hierarchy of exchange interaction in the system. The strongest antiferromagnetic exchange coupling was found in the shortest Co-Co pairs and is due to direct and superexchange interactions between the half-filled xz+yz orbitals pointing directly to each other. The other four out of six nearest neighbor exchanges within the cobalt hexagon are suppressed, since for these bonds active half-filled orbitals turned out to be parallel and do not overlap. The electron spin resonance (ESR) spectra reveal a Gaussian shape line attributed to Co 2+ ion in octahedral coordination with average effective g-factor g=2.3±0.1 at room temperature and shows strong divergence of ESR parameters below ~ 120 K, which imply an extended region of short-range correlations. Based on the results of magnetic and thermodynamic studies in applied fields, we propose the magnetic phase diagram for the new honeycomb-lattice delafossite.

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“…A large variety of ternary oxides in the M-Sb-O system (M = Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Zn 2+ , Mg 2+ ) have previously been described in the literature [11][12][13][14][15]. The oxidation state of the Sbcations plays an important role when forming different kinds of crystal structures.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure of the Disordered Non-Centrosymmetric Compound Fe0.43Mo2.56SbO9.5

2019

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Single crystals of Fe 0.43 Mo 2.56 SbO 9.5 were obtained by hydrothermal techniques at 230 • C. The crystal structure was determined from single crystal X-ray diffraction data. The compound crystallizes in the non-centrosymmetric space group Pc with unit cell parameters a = 4.0003(2) Å, b = 7.3355(3) Å, c = 12.6985(6) Å, β = 90 • . The crystal structure comprises five crystallographically independent M atoms and one Sb 3+ atom, M atoms are of two kinds of partially occupied sites Mo 6+ and Fe 3+ . The building blocks consist of [SbO 3 O 0.5 O 0.5 E] octahedra (E = lone electron pair) and [(Mo/Fe)O 6 ] octahedra. The M = (Mo, Fe) and O atoms are arranged in a distorted hexagonal 2D-net, not the Sb atoms. The distortion of the net and consequently the symmetry reduction results mainly from the location of the Sb atoms. Disorder manifests itself as a splitting of the metal sites and as a consequent shortening of the Mo-Fe distances. Six (Mo/Fe)O 6 octahedra are connected to form a pseudohexagonal channel. The Sb 3+ atom is displaced from the pseudo-six-fold axis.

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Mixed oxides of sodium, antimony (5+) and divalent metals (Ni, Co, Zn or Mg)

Cited by 70 publications

References 28 publications

Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

Orbitally induced hierarchy of exchange interactions in the zigzag antiferromagnetic state of honeycomb silver delafossite Ag₃Co₂SbO₆

Crystal Structure of the Disordered Non-Centrosymmetric Compound Fe0.43Mo2.56SbO9.5

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Mixed oxides of sodium, antimony (5+) and divalent metals (Ni, Co, Zn or Mg)

Cited by 70 publications

References 28 publications

Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonatesA3Ni2SbO6(A=<

Orbitally induced hierarchy of exchange interactions in the zigzag antiferromagnetic state of honeycomb silver delafossite Ag3Co2SbO6

Crystal Structure of the Disordered Non-Centrosymmetric Compound Fe0.43Mo2.56SbO9.5

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Orbitally induced hierarchy of exchange interactions in the zigzag antiferromagnetic state of honeycomb silver delafossite Ag₃Co₂SbO₆