Ferroelectric-Specific Stark Effect in Stoichiometric LiNbO3∶Fe at Room Temperature
Abstract
By means of EPR spectroscopy of LiNbO3∶Fe at room temperature (RT) it is shown that the Stark effect in ferroelectric crystals can be different from that observed in other materials. Novel properties appear when an external E field reverses the direction of the spontaneous polarization, the direction of the linear Stark shift stays the same with a reversal of the E field. The corresponding spectral line shifts can occur over a long time scale (hours). These properties seem to be a general feature of the Stark effect in ferroelectric crystals when the external E field exceeds the coercive field.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2008
- DOI:
- 10.1103/PhysRevLett.100.057602
- Bibcode:
- 2008PhRvL.100e7602B
- Keywords:
-
- 77.80.Fm;
- 76.30.Fc;
- 77.84.Dy;
- Switching phenomena;
- Iron group ions and impurities;
- Niobates titanates tantalates PZT ceramics etc.