Multiferroic properties of BiFeO3-(K0.5Bi0.5)TiO3 ceramics
Multiferroic properties of BiFeO3-(K0.5Bi0.5)TiO3 ceramics
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DOI：
10.1016/j.matlet.2012.12.053
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发表时间：
2013-03
影响因子：
3
通讯作者：
J. Bennett;A. Bell;T. Stevenson;Ronald I. Smith;I. Sterianou;I. Reaney;T. Comyn
中科院分区：
文献类型：
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作者：
J. Bennett;A. Bell;T. Stevenson;Ronald I. Smith;I. Sterianou;I. Reaney;T. Comyn
制备了xBiFeO3-(1−x)(K0.5Bi0.5)TiO3（其中x=0.6, 0.7和0.8）陶瓷，并使用中子衍射对其进行了表征，显示出g型反铁磁结构。铁电居里温度为> ~ 430℃，n<s:1>温度为228 ~ 254℃，随x升高而升高。对于成分x=0.6, Ps=26μC/cm2，矫顽力场=3.85kV/mm，通过应变和极化场测量证实了铁电性。在x=0.6时，该材料的低场d33为37pm/V，高场d33为80pm/V时观察到压电性。该体系中矫顽力场的减小与氧八面体的倾斜角有关。固溶体xBiFeO3-(1−x)(K0.5Bi0.5) tio3具有高温、压电、多铁体系的潜力。
Ceramics of xBiFeO3-(1−x)(K0.5Bi0.5)TiO3(where x=0.6, 0.7 and 0.8) have been produced, and characterized using neutron diffraction, revealing a G-type antiferromagnetic structure. The ferroelectric Curie temperature was >430°C, and the Néel temperature was in the range 228–254°C, increasing with x. Ferroelectricity was confirmed using strain and polarization-field measurements, for the composition x=0.6, with a Ps=26μC/cm2and a coercive field=3.85kV/mm. Piezoelectricity was observed for this material with a low-field d33of 37pm/V, and a high-field d33⁎of 80pm/V where x=0.6. The reduction in coercive field in this system is shown to correlate with the oxygen octahedral tilt angle. The solid solution xBiFeO3-(1−x)(K0.5Bi0.5)TiO3has potential as a high temperature, piezoelectric, multiferroic system.