Synthesis, structure and magnetic properties of honeycomb-layered Li₃Co₂SbO₆ with new data on its sodium precursor, Na₃Co₂SbO₆

Abstract

Crystallographic and magnetic properties of new layered honeycomb-lattice Li3Co2SbO6 antimonate were studied and compared with its sodium precursor Na3Co2SbO6.

Honeycomb layered oxides: structure, energy storage, transport, topology and relevant insights

“…Competing interactions or 'frustrations' may also cause the spins in a honeycomb lattice to orient haphazardly (magnetic disorder), even at low temperatures, leading to a plenitude of exotic magnetic states such as spin-glasses and spin-flop behaviour as has been noted in oxides such as Li 3 Co 2 SbO 6 . 75,246 Complex magnetic phase diagrams as well as enigmatic interactions (Heisenberg-Kitaev interactions, Dzyaloshinskii-Moriya (DM) interactions, etc. are discussed in the last section of this review) can be envisaged in the honeycomb layered oxides.…”

“…, etc. where M = Fe, Mn, Co, Ni, Cu, Zn, Mg or a combination of at least two transition or alkaline-earth metal atoms; D = Te, Sb, Bi, Nb; A = Cu, Ag, Li, Na, K. 16,22,32,59,66,71,75,79,86,92,130,168,256 For clarity's sake, the error bars associated with each data point are smaller than the size of the data markers. (b) A fragment of a honeycomb layered oxide such as K 2 Ni 2 TeO 6 in the ab plane, showing the two-dimensional (2D) diffusion channels of potassium ions.…”

Kitaev Spin Liquid in 3d Transition Metal Compounds

“…11(b). In addition, a sister compound Li 3 Co 2 SbO 6 has ab-plane FM order 96,97 (most likely due to smaller Co-O-Co bond angle, 91 • versus 93 • , slightly enhancing the FM J value and thus stabilizing the FM order). These facts imply that zz1 and FM//ab states are indeed closely competing in Na 3 Co 2 SbO 6 .…”

“…Honeycomb lattice cobaltates.-A number of such compounds are known: A 3 Co 2 SbO 6 (A ¼ Na; Ag; Li) [18][19][20]43,44], Na 2 Co 2 TeO 6 [18,[45][46][47], BaCo 2 ðXO 4 Þ 2 (X ¼ As, P) [48][49][50][51], CoTiO 3 [52][53][54], CoPS 3 [55,56]. They are quasi-two-dimensional magnets; within the ab planes, zigzag or FM order is most common.…”

“…1, we believe it is close to the FM==ab phase, based on the following observations. First, a sister compound Li 3 Co 2 SbO 6 has ab-plane FM order [44] (most likely due to smaller Co-O-Co bond angle, 91°versus 93°, slightly enhancing the FM J value). Second, zigzag order gives way to fully polarized state at small magnetic fields [18,20].…”