Tetragonal BiFeO₃ on yttria-stabilized zirconia

Strain Engineering of Epitaxial Oxide Heterostructures Beyond Substrate Limitations

“…4c and 4d) reveals the realization of true T phase (not MC phase) BFO via this proposed method. Although the nearly tetragonal phase on LAO 58 and YSZ 59 substrates by biaxial strain and true T phase on LAO by chemical doping 49 or uniaxial strain [37][38][39] have been reported, here we obtain true T phase BFO using biaxial strain. RSM data of To gain further understanding of the atomic structure of these strained heterostructures, we performed annular dark-field scanning transmission electron microscopy (ADF-STEM) studies on the BFO (~ 7 nm)/CCMO (~ 27 nm)/STO sample.…”

Dependence of the Thermal Conductivity of BiFeO3 Thin Films on Polarization and Structure

“…4(a)), thus leading to a much higher domain wall density. Meanwhile, both of them exhibit a weak vertical PFM contrast, indicating those domains might have an in-plane polarization component due to a deviation of the ferroelectric axis from the c-axis [37]. As for R-like samples, the domains of R-5 are more random, much smaller, and of a higher density than R-100.…”

Strain engineering of epitaxial oxide heterostructures beyond substrate limitations

“…Moreover, the BFO (103) and (113) RSM reflections (Figures 4C and 4D) reveal the realization of the T R phase BFO via this proposed method. Although other approaches such as biaxial strain induced on LAO 64 and YSZ 65 substrates, chemical doping, 50 and uniaxial strain 39,40 have also been reported to obtain T-BFO, here we achieve T R -phase BFO beyond substrate limitations. RSM data of 50-nm-thick 2F, and S2C) and illustrate the formation of a highly distorted T phase in 50-nm-thick BFO film, which exhibits three-fold splits along (103) and two-fold splits along (113).…”