Because the magnetism and transport properties of these compounds scale with the Mn-O-Mn bond angle, which defines the balance between com- petitive electronic and magnetic interactions, these materials are highly sensitive to external parameters which can distort the crystallographic structure, like ...
Such gradual suppression of octahedral tilt has been observed for the BiFeO3/(LaSr)MnO3 interface30, where the Fe-O-Fe bond angle was modified over a distance of 10 unit cells by 6° near the interface. Recently a similar suppression of octahedral tilt and its polar effect has been reporte...
The signs and magnitudes of the trigonal distortion angles δβ (≈ ?0.3 and 0.4°) related to an ideal octahedron and the local angular variations Δβ related to the host bond angle are suitably illustrated by those of the axial distortion degree (ADD) and the angular variation degree (...
For a perfect cubic perovskite, the MOM bond angle is 180°. The relative lengths of the RO and MO bonds determine the stability of the cubic structure. The Goldschmidt tolerance factor t=d(RO)/d(MO)2, where d(RO) and d(MO) are the actual RO and MO bond lengths (that can be ...
This density corresponds to that of the ideal LSMO brownmillerite lattice. In the remainder of the LSMO film and STO substrate, NVO was initially set to 1022 m−3. Triangular voltage pulses with a duration of 100 ms were applied to the backside of the STO substrate (the metal tip ...
Note that there appears a sudden drop of tilting angle to zero, which can be ascribed to the relative change of two valleys on the energy curve at that in-plane lattice constant. The change of tilting angle associated with the minimum energy is presented in Fig. 2e, where a− ...
As the calculated values of VBOs based on measured values of the IPs as well as theoretical studies24 suggest the VB maximums do not exhibit large shifts in energy with strain over the experimentally accessed range, and also taking into account that the predicted UPS-derived ideal offsets are...
A previously unreported tetragonal phase has been discovered in a epitaxially strained GdMnO3 thin films deposited on (001)-oriented SrTiO3 substrates by radio frequency (RF) magnetron sputtering. The tetragonal axis of the films grown up to a 35 nm t
The electrical resistance was continuously monitored and scanning TEM (STEM) images with high-angle annular dark field contrast were simultaneously recorded after application of short triangular voltage pulses to the STO side of the specimen. We used the STEM mode deliberately to limit electron beam ...
In addition, the XRD pattern of the SrMnO3/f-BN composite shows a slight decrease in crystallinity planes, with a lower angle shift in Figure 1B(c). However, the peaks at (002) and (100) planes continue to exist in the pattern, indicating the incorporation of the f-BN nanosheet with...