Self‐assembled patterned CoFe2O4‐SrRuO3 electrodes: Enhanced functional properties by polar nano‐regions reorientation
Abstract
Epitaxial CoFe2O4 (CFO) and SrRuO3 (SRO) nanopillar heterostructures were deposited on Pb(Mg1/3Nb2/3)0.70Ti0.30O3 (PMN‐30PT) single crystal substrates by switch pulsed laser deposition (SPLD). Since the CFO nanopillars are insulating, and the SRO matrix conductive, this self‐assembled nanopillar heterostructure served as a patterned electrode on PMN‐PT, which then enhances the dielectric and piezoelectric constant of the substrate. Cross‐sectional electron microscopy images revealed the formation of a nanopillar heterostructure layer with CFO nanopillars within a SRO matrix. AFM and XRD revealed good topography and epitaxy, indicating a high quality SRO‐CFO self‐assembled nanopillar structure. Using a SRO‐CFO thin film patterned electrode, PMN‐PT was found to have a notably higher (30%) dielectric constant with increasing electric field and enhanced transverse broadening in reciprocal spacing mapping (RSM) scans.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 13, 2020
- Source ID
- 10.1111/jace.17053
Entities
People
- D. Viehland
- Haosu Luo
- Jiefang Li
- Min Gao
- Xiao Tang
Organizations
- Air Force Office of Scientific Research
- Shanghai Institute of Ceramics
- Virginia Tech