Stress-and temperature-dependent scaling behavior of dynamic hysteresis in soft PZT bulk ceramics
Effects of electric field-frequency, electric field-amplitude, mechanical stress, and temperature on the hysteresis area, especially the scaling form, were investigated in soft lead zirconate titanate (PZT) bulk ceramics. The hysteresis area was found to depend on the frequency and field-amplitude with the same set of exponents as the power-law scaling for both with and without stresses. The inclusion of stresses into the power-law was obtained in the form of <A-Aσ=0∝f-0.25E0σ0.44 which indicates the difference in energy dissipation between the under-stress and stress-free conditions. The power-law temperature scaling relations were obtained for hysteresis area (A) and remanent polarization Pr, while the coercivity EC was found to scale linearly with temperature T. The three temperature scaling relations were also field-dependent. At fixed field amplitude E0, the scaling relations take the forms of <A>∝T-1.1024, Pr∝T-1.2322 and (EC0-EC)∝T.
R Yimnirun S Wongsaenmai R Wongmaneerung N Wongdamnern A Ngamjarurojana S Ananta Y Laosiritaworn
Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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
184-189
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）