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Microscopic simulations of the behavior of ferroelectrics and ferromagnetics

机译：铁电和铁磁行为的微观模拟

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摘要

Ferroelectric and ferromagnetic materials have wide engineering applications. The defects and size effects are important reliability and sensitivity issues in the application of such materials. In this paper, phase field simulations were carried out to study the effects of cracks in ferroelectrics and size effects on ferromagnetics. In the former simulation, the crack tip domain switching regions and stress fields were plotted. The results obtained showed that a negative electric field tends to open the crack, whereas a positive field tends to close it. In the latter simulation, it was found that both the hysteresis and coercivity were greatly affected by the ratio of the characteristic length to domain wall width.
机译：铁电和铁磁材料具有广泛的工程应用。在这种材料的应用中，缺陷和尺寸效应是重要的可靠性和敏感性问题。在本文中，进行了相场模拟以研究铁电体中裂纹的影响以及铁磁体中尺寸的影响。在以前的模拟中，绘制了裂纹尖端区域切换区域和应力场。所获得的结果表明，负电场倾向于打开裂纹，而正电场倾向于闭合裂纹。在后面的模拟中，发现磁滞和矫顽力都受特征长度与畴壁宽度之比的很大影响。

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  • 来源
  • 会议地点 Hangzhou(CN);Hangzhou(CN)
  • 作者

    S.C.Huang; rnH.L.Chang; rnK.W.Su; rnY.F.Chen; rnK.F.Haung;

  • 作者单位

    Y C Song@Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China--R L Hu@Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China--A K Soh@Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China--;

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  • 正文语种 eng
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