Impact of Isovalent and Aliovalent Doping on Mechanical Properties of Mixed Phase BiFeO3.

@article{Heo2017ImpactOI,
  title={Impact of Isovalent and Aliovalent Doping on Mechanical Properties of Mixed Phase BiFeO3.},
  author={Yooun Heo and Songbai Hu and Pankaj Kumar Sharma and Kwang-Eun Kim and Byung-Kweon Jang and Claudio Cazorla and Changduk Yang and Jan Seidel},
  journal={ACS nano},
  year={2017},
  volume={11 3},
  pages={
          2805-2813
        }
}
In this study, we report the effect of doping in morphotropic BiFeO3 (BFO) thin films on mechanical properties, revealing variations in the elasticity across the competing phases and their boundaries. Spectroscopic force-distance (F-D) curves and force mapping images by AFM are used to characterize the structure and elastic properties of three BFO thin-film candidates (pure-BFO, Ca-doped BFO, La-doped BFO). We show that softening behavior is observed in isovalent La-doped BFO, whereas hardening… 
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References

SHOWING 1-10 OF 66 REFERENCES
Effect of lanthanum doping on tetragonal-like BiFe O 3 with mixed-phase domain structures
The recent discoveries of both chemical-driven and strain-driven morphotropic phase boundaries (MPBs) in $\mathrm{BiFe}{\mathrm{O}}_{3}$ (BFO) thin films have opened up new horizons in developing…
Structural and electronic transformation pathways in morphotropic BiFeO3
TLDR
This work demonstrates a critical step to control and use non-volatile strain-conductivity coupling at the nanoscale and provides a framework for exploring a route to control multiple order parameters coupled to ferroelastic and ferroelectric order in multiferroic materials.
Revealing the flexoelectricity in the mixed-phase regions of epitaxial BiFeO3 thin films
TLDR
The correlation between elastic modulation and piezoresponse across the mixed-phase regions manifests that the flexoelectric effect results in the enhancement of the piezorsponse at the phase boundaries and in the MI regions, which accounts for the giant electromechanical effect in strained mixed- phase BiFeO3 films.
Insights into the phase diagram of bismuth ferrite from quasiharmonic free-energy calculations
We have used first-principles methods to investigate the phase diagram of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic and vibrational features that control the occurrence of…
A Strain-Driven Morphotropic Phase Boundary in BiFeO3
TLDR
Electric field–dependent studies show that a tetragonal-like phase can be reversibly converted into a rhombohedral- like phase, accompanied by measurable displacements of the surface, making this new lead-free system of interest for probe-based data storage and actuator applications.
Electric control of straight stripe conductive mixed-phase nanostructures in La-doped BiFeO3
Some materials exhibit ‘morphotropic phase boundaries’ at which their crystal structure abruptly changes from a tetrahedral to a rhombohedral lattice. Such phase boundaries are created under high…
Characterization and manipulation of mixed phase nanodomains in highly strained BiFeO3 thin films.
TLDR
Findings are important for an in-depth understanding of the ultrahigh electromechanical response arising from phase transformation between competing phases, enabling future explorations on the electronic structure, magnetoelectricity, and other functionalities in this new MPB system.
Elastic properties of cubic and rhombohedralBiFeO3from first-principles calculations
First-principles elastic constants cij’s of BiFeO3 with cubic nonmagnetic NM /ferromagnetic FM structures and rhombohedral antiferromagnetic AFM structure have been calculated within the generalized…
Electric modulation of conduction in multiferroic Ca-doped BiFeO3 films.
TLDR
The observation of an electronic conductor-insulator transition by control of band-filling in the model antiferromagnetic ferroelectric BiFeO3 through Ca doping opens the door to merging magnetoelectrics and Magnetoelectronics at room temperature by combining electronic conduction with electric and magnetic degrees of freedom already present in the multiferroic Bi FeO3.
Characterization of interface defects in BiFeO3 metal–oxide–semiconductor capacitors deposited by radio frequency magnetron sputtering
In this work, we study the structural and electrical properties of BiFeO3 MOS capacitors with a special focus on the oxide–semiconductor interface for gate dielectric applications. For this purpose…
...
1
2
3
4
5
...