Streiffer S K, Eastman J A, Fong D D, Thompson Carol, Munkholm A, Ramana Murty M V, Auciello O, Bai G R, Stephenson G B
Materials Science Division, Argonne National Laboratory, Illinois 60439, USA.
Phys Rev Lett. 2002 Aug 5;89(6):067601. doi: 10.1103/PhysRevLett.89.067601. Epub 2002 Jul 19.
We report the observation of periodic 180 degrees stripe domains below the ferroelectric transition in thin films. Epitaxial PbTiO3 films of thickness d=1.6 to 42 nm on SrTiO3 substrates were studied using x-ray scattering. Upon cooling below T(C), satellites appeared around Bragg peaks indicating the presence of 180 degrees stripe domains of period Lambda=3.7 to 24 nm. The dependence of Lambda on d agrees well with theory including epitaxial strain effects, while the suppression of T(C) for thinner films is significantly larger than that expected solely from stripe domains.
我们报告了在薄膜铁电转变温度以下对周期性180度条纹畴的观测结果。使用X射线散射研究了在SrTiO₃衬底上厚度d = 1.6至42 nm的外延PbTiO₃薄膜。在冷却至T(C)以下时，布拉格峰周围出现了卫星峰，表明存在周期为Λ = 3.7至24 nm的180度条纹畴。Λ对d的依赖性与包括外延应变效应的理论非常吻合，而较薄膜的T(C)抑制明显大于仅由条纹畴预期的抑制。
Zotero 插件