Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
76 (1994), S. 1983-1985
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A ferro-antiferroelectric Li0.7Na0.3NbO3 solid solution crystal was grown from the melt by the Czochralski method. It has been found from the high temperature x-ray diffraction that the crystal is orthorhombic with a unit cell of dimensions a=5.374(9) A(ring), b=5.152(1) A(ring), and c=16.738(0) A(ring) at 25 °C, and undergoes a structural phase transition from orthorhombic to tetragonal at 480 °C. It was confirmed from the observation of the D-E hysteresis loop and the pyroelectric measurements that the mixed crystal Li0.7Na0.3NbO3 undergoes a first order ferroelectric phase transition at 480 °C. In the dielectric measurements, the dielectric behavior in the vicinity of the phase transition temperature reveals a diffusive character and also a pronounced dielectric dispersion due to an ionic hopping observed over the wide temperature range near 298 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.357662
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