کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
800460 | 1467558 | 2006 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A dual-phase homogenization theory for the hysteresis and butterfly-shaped behavior of ferroelectric single crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Based on the mechanism of domain switch and a micromechanics-based thermodynamic approach, a dual-phase homogenization theory is developed to calculate the hysteresis loops of ferroelectric single crystals. Unlike the classical phenomenological theories, this dual-phase model is capable of delivering the evolution of new domain concentration, and it further indicates that the driving force for domain switch under a pure electric field increases linearly with the applied E. The theory is then applied to a BaTiO3 crystal, to examine its hysteresis loop between the electric displacement D vs. the field E, and the butterfly-shaped longitudinal strain ε vs. E. Two types of switching process have been employed for the reversal of ferroelectric domains: a direct 180° switch for the D vs. E, and a two-consecutive 90° switch for the ε vs. E as well as for the D vs. E. The second process enables one to bring about the sharp tails of the butterfly in the ε vs. E curve that otherwise could not be done by the direct 180° switch. Comparisons with the experimental data of a BaTiO3 crystal also indicate a reasonable agreement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 38, Issues 8â10, AugustâOctober 2006, Pages 945-957
Journal: Mechanics of Materials - Volume 38, Issues 8â10, AugustâOctober 2006, Pages 945-957
نویسندگان
N. Srivastava, G.J. Weng,