Unusually Stable Ferroelectric 180° a-a Nanostripe and Nanoneedle Domains in Thin Films Prepared from a Bulk Single Crystal of BaTiO3 with FIB: TEM Observations and Phase-Field Simulations
Unusually stable ferroelectric 180° a-a nanostripe domain structure in a thin (≤100 nm) film prepared from a bulk single crystal of BaTiO3 with focused-ion beam (FIB) was observed by transmission electron microscopy (TEM). The domain consists of alternate sequences of narrow and wide anti-parallel domains. High-magnification images of a stable 180° nanoneedle domain, with a sharp tip penetrating into the nanostripe domains, were also obtained. Twodimensional phase-field simulations based on TDGL equations suggest that such a domain structure is stabilized by an in-plane anisotropic stress and an anisotropic mechanical boundary condition of the thin film prepared with FIB.
Takao Matsumoto Masakuni Okamoto
Central Research Laboratory,Hitachi,Ltd.,1-280 Higashi-Koigakubo,Kokubunji-shi,Tokyo 185-8601,Japan Mechanical Engineering Research Laboratory,Hitachi,Ltd.,832-2,Horiguchi,Hitachi-Naka,Ibaraki 312-003
国际会议
西安
英文
51-54
2009-08-23(万方平台首次上网日期,不代表论文的发表时间)