Abstract
This essay discusses recent work on bismuth ferrite, which reveals theoretically and experimentally a phase transition under stress that does not change symmetry but changes the c/a lattice constant ratio. As shown by Ishibashi, such transitions must be discontinuous and are described by free energies eighth-order in polarization P. Such a predicted two-step change in P is also known in potassium nitrate films.
| Original language | English |
|---|---|
| Pages (from-to) | 2106-2107 |
| Number of pages | 2 |
| Journal | Advanced Materials |
| Volume | 22 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 18 May 2010 |
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