Coexistence of ergodicity and nonergodicity in LaFeO 3 -modified Bi 1/2 (Na 0.78 K 0.22 ) 1/2 TiO 3 relaxors
作者： Hyoung-Su Han , Wook Jo , Jürgen Rödel , In-Ki Hong , Weon-Pil Tai
DOI: 10.1088/0953-8984/24/36/365901
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摘要: The effect of LaFeO3 addition to Bi1/2(Na0.78K0.22)1/2TiO3 ceramics on the phase stability and macroscopic functional properties was investigated. Similarly other chemical modifiers known in literature, suppresses an electric-field-induced long-range ferroelectric order, giving rise a giant unipolar strain ~0.3% at 2 mol% addition. Time-dependent changes polarization hysteresis loops both during successive electrical cycling after removal electric field suggest that specimen with consists ergodic nonergodic phases, which is unique among relaxor materials.
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