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(Color online) Variation of polarization and strain under the application of electric field in (Ag1 − x Na x )NbO3 solid solutions.
Dielectric behaviors of (Ag1− x Na x )NbO3 solid solutions. Data were obtained at 100 kHz and an ac level of 1 V/mm. , , and represent the ferroelectric (Ref. 3), antiferroelectric (Ref. 9), and paraelectric orthorhombic-tetragonal (Ref. 9) phase transitions, respectively. Tf was suggested to be a freezing temperature at which partial freezing of the Nb ion dynamics occurs (Refs. 24 and 25).
(Color online) Variation of the transition temperatures detected from the dielectric measurements. It can be seen that there is a remarkable change around x ≈ 0.8, which is in good agreements with polarization observations.
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