Abstract
Aging, the gradual changing of materials properties with time, is a well observed but puzzling phenomenon in ferroelectrics. It lowers the reliability of ferroelectric devices, and is thus usually undesirable. However, based on a defect mediated reversible domain switching mechanism, we obtained large recoverable electro-strain in aged BaTiO3-based ferroelectric crystals, which indicates aging is not always a detrimental effect; it might be beneficial for applications. Moreover, direct evidence for the reversible domain switching process was given by in situ polarizing microscope observation. The underlying microscopic origin was discussed in light of a symmetry-conforming short-range-order (SC-SRO) principle of point defects and electron paramagnetic resonance spectroscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 69-77 |
| Number of pages | 9 |
| Journal | Functional Materials Letters |
| Volume | 3 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 2010 |
Keywords
- Ferroelectric aging
- barium titanate
- electronic paramagnetic resonance
- point defects
- symmetry-conforming principle
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