Subsolidus phase relations, crystal chemistry and cation-transport properties of sodium iron antimony oxides

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

“…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].…”

Crucial Role of Site Disorder and Frustration in Unusual Magnetic Properties of Quasi-2D Triangular Lattice Antimonate Na4FeSbO6

“…A particularly challenging case to deal with is antisite disorder, which often takes place when a system contains cations of similar sizes [20][21][22][23][24][25][26]. The present work is concerned with the antisite disorder in the layered oxide Na 4 FeSbO 6 [27]. Na 4 FeSbO 6 [27] is structurally quite similar to the layered oxide Li 4 FeSbO 6 [28], in which the (LiFeSbO 6 ) 3-layers parallel to the ab-plane alternate with layers of Li ?…”

“…The present work is concerned with the antisite disorder in the layered oxide Na 4 FeSbO 6 [27]. Na 4 FeSbO 6 [27] is structurally quite similar to the layered oxide Li 4 FeSbO 6 [28], in which the (LiFeSbO 6 ) 3-layers parallel to the ab-plane alternate with layers of Li ? ions along the c-direction.…”

“…With h = -17 K and T N = 3.6 K, Li 4 FeSbO 6 has f = 4.7, so the spin frustrations arising from the triangular spin lattice are not strong enough to prevent a long-range AFM ordering. Since Na 4 FeSbO 6 [27] is structurally analogous to Li 4 FeSbO 6 [28], one would expect Na 4 FeSbO 6 and Li 4 FeSbO 6 to possess similar magnetic properties. In contrast, our experimental and theoretical investigations show that Na 4 FeSbO 6 has antisite disorders between the Fe 3?…”

Alkali Metal Cation and Proton Conductors: Relationships between Composition, Crystal Structure, and Properties

“…This, in turn, makes the bottlenecks narrower. As an illustration, in the O3-type Na 0.8 (M y M 0 1Ày )O 2 , where MM 0 ¼ NiTi, FeTi, FeSb, NiSb [70,71], a increases, c remains almost constant, and the ionic conductivity decreases, despite an increasing electronegativity of the MM 0 pair (see Section 7.2.4).…”