Phase transitions in BiFeO3 nanoislands with enhanced electromechanical response
Phase transitions in BiFeO3 nanoislands with enhanced electromechanical response
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BiFeO3 纳米岛中的相变具有增强的机电响应
DOI:
10.1016/j.ceramint.2018.08.265
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发表时间:
2018-12
影响因子:
5.2
通讯作者:
Liu Jun Ming
中科院分区:
文献类型:
--
作者:
Sun Fei;Tian Guo;Chen Chao;Deng Xiong;Li Peilian;Chen Zoufei;Yang Wenda;Gao Xingsen;Fan Zhen;Qin Minghui;Zeng Min;Lu Xubing;Zhou Guofu;Chen Deyang;Liu Jun Ming
We propose a novel method to drive phase transitions by etching strained BiFeO3thin films to nanoislands. Atomic force microscopy (AFM) measurements reveal that the amount of rhombohedral-like (R) phase increases as the BiFeO3thin films with tetragonal-like (T) matrix are etched to nanoislands and larger fraction of R phase can be obtained with the size reduction from 1 μm to 200 nm, indicating the T to R phase transitions induced by partial release of substrate clamping. Using piezoresponse force microscopy (PFM), it is demonstrated that rhombohedral-like (R) to tetragonal-like (T) phase transitions can be reversibly achieved under DC electric field in BFO nanoislands. Large electromechanical response has been observed in BFO nanoislands as well. This approach can be extended to other strained oxide films and provide guidance for the development of high-performance electromechanical lead-free materials.
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16.6
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Yang CH
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16.6
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2.1
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