首页|Robust and Tunable Ferroelectricity in Ba/Co Codoped(K0.5Na0.5)NbO3 Ceramics
Robust and Tunable Ferroelectricity in Ba/Co Codoped(K0.5Na0.5)NbO3 Ceramics
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The 0.98(K0.5Na0.5)NbO3-0.02Ba(Nb0.5Co0.5)O3-δ ceramics with doped Ba2+and Co2+ions are fabricated,and the impacts of the thermal process are studied.Compared with the rapidly cooled(RC)sample,the slowly cooled(SC)sample possesses superior dielectric and ferroelectric properties,and an 11K higher ferroelectric-paraelectric phase transition temperature,which can be attributed to the structural characteristics such as the grain size and the degree of anisotropy.Heat treatment can reversibly modulate the content of the oxygen vacancies,and in turn the ferroelectric hysteresis loops of the samples.Finally,robust and tunable ferroelectric property is achieved in SC samples with good structural integrity.
刘佳讯、查节林、杨玉龙、吕笑梅、胡雪莉、阎朔、吴子敬、黄凤珍
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National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China
Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China
National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaPriority Academic Program Development ofJiangsu Higher Education Institutions(PAPD)
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