Microscopic simulations of the behavior of ferroelectrics and ferromagnetics
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.
Y C Song R L Hu A K Soh
Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
136-139
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）