Abstract
By means of an optical investigation of Cr-Cl boracite crystals in polarized light it has been found that an orthorhombic mm2 phase is induced by stress, generated at the mechanically non-matching cubic (43m)/tetragonal (42m) interface, during the first order phase transition at T1 = 264 K. Electric field studies under simultaneous optical control have shown that the orthorhombic mm2 phase can also be induced in the entire temperature range of the nonpolar 42m phase above an electric threshold field strength of about 90 kV • cm -1. On the basis of optical domain observations and electric measurements, a revised electric field strength/temperature phase diagram is proposed and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 251-260 |
| Number of pages | 10 |
| Journal | Ferroelectrics |
| Volume | 116 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 1991 |
Keywords
- Cr-Cl boracite
- ferroelasticlferroelectric domains
- induced phase transitions
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