Periodic elastic nanodomains in ultrathin tetrogonal-like BiFeO3 films
arXiv:1306.4906 · doi:10.1103/PhysRevB.88.064103
Abstract
We present a synchrotron grazing incidence x-ray diffraction analysis of the domain structure and polar symmetry of highly strained BiFeO3 thin films grown on LaAlO3 substrate. We revealed the existence of periodic elastic nanodomains in the pure tetragonal-like BFO ultrathin films down to a thickness of 6 nm. A unique shear strain accommodation mechanism is disclosed. We further demonstrated that the periodicity of the nanodomains increases with film thickness but deviates from the classical Kittel's square root law in ultrathin thickness regime (6 - 30 nm). Temperature-dependent experiments also reveal the disappearance of periodic modulation above 90C due to a MC-MA structural phase transition.
Accepted in Phys. Rev. B
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Cited by in corpus (4)
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- 180 degree Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films
- Anisotropic optical properties of rhombohedral and tetragonal thin film BiFeO phases
- An empirical approach to measuring interface energies in mixed-phase bismuth ferrite