Figure 1

HAADF images and SAED patterns of BNTFC–x: (a) x = 0.1; (b) x = 0.3; (c) x = 0.5; (d) x = 0.7; (e) x = 0.9; (f) x = 1.0. The big white spots represent the Bi (Nd) atoms, while the small spots located near the center of Bi/Nd lattice represent the Ti/Fe/Co atoms. The inset in (b) and (e) is a magnifying image for 4- and 3-layered phase, respectively, where the azury and green sphere denote Bi/Nd and Ti/Fe/Co atoms, respectively. For (a,c,e and f), the viewing direction is along [100], while for (b) and (c) the viewing direction is along
. For x ≤ 0.5, the marked diffraction spots belong to 4-layered phase, while for x > 0.5 the marked diffraction spots belong to 3-layered phase.