Figure 1
From: Sub-lattice of Jahn-Teller centers in hexaferrite crystal
(a) Ti-doped hexaferrite BaFe12O19 single crystal. (b) The iron ion Fe(3) in the 4f1 tetrahedral coordination in the cube shown in Cartesian system (z-axis is parallel to hexagonal c -axis; y-axis is parallel to b-axis). The JT local deformations occur along the edges of the cube 1–5, 1–6 and 1–7; they all are inclined with respect to hexagonal c-axis. (c) Structure of magnetoplumbite according to30: barium is gray (large), oxygen is purple, Fe(1) is red (position 2a), Fe(2) is brown (2b), Fe(3) is olive (4f1), Fe(4) is small green (4f2), Fe(5) is pink (12k). (d) A clarified view of the sub-lattice of the JT centers in tetrahedral coordination.
