In this comment, by using Monte Carlo simulation, we show that the perpendicular shift of hysteresis loops reported in the commented work is nothing special but simply due to the fact that the range of field does not surpass the reversible field beyond which the two branches of the loop merge. If the reversible field is exceeded, the shift is no longer observed. Moreover, we point out that even using a small range of field, the shift will not be observed if the observation time is long enough for the reversible field to drop within the range.
Reply to cond-mat/0211660: Comments on "A model for fatigue in ferroelectric perovskite thin films" published in Appl. Phys. Lett, 76, 1060 (2000); addendum, ibid. p.3655
Comment on "Fe valency-induced effect on the magnetic and electrotransport properties in Nd$_{0.67}$Sr$_{0.33}$Mn$_{1-x}$Fe$_x$O$_3$ polycrystalline system" [Appl. Phys. Lett. 82, 1721 (2003)]
对“Fe valency-induced effect on the magnetic and electrotransport properties in Nd $_{0.67}$ Sr $_{0.33}$ Mn $_{1-x}$ Fe $_x$ O $_3$ polycrystalline system”[Appl. Phys. Lett. 1721（2003）]
Comment on ``Elastic Stabilization of a Single-Domain Ferroelectric State in Nanoscale Capacitors and Tunnel Junctions" [N.A. Pertsev and H. Kohlstedt, Phys. Rev. Lett. 98, 257603 (2007).]
在最近的一封信中[N. A. Pertsev和H. Kohlstedt，Phys. Rev. Lett. 98，257603（2007）]作者声称“甚至纳米级电容器和隧道结也可以具有足以用于存储器应用的面外极化。“在这里，我们以一种基本的方式表明，这个结论并没有被他们的计算所证实，他们应该在他们的近似值中得出相反的结论。
Comment on "First-principles studies on magnetic properties of rocksalt structure $M$C ($M$=Ca,Sr, and Ba) under pressure"[Appl. Phys. Lett. 98,182501(2011)]
Comments on "Band gap and band parameters of InN and GaN from quasiparticle energy calculations based on exact-exchange density-functional theory" [Appl. Phys. Lett. 89, 161919 (2006)]
A Room-Temperature Ferrotoroidic Material Exhibiting Magnetic Semiconductor Properties with Superhigh Hole Mobility
Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory, Beijing National Laboratory for Molecular Sciences, Center for Applied Physics and Technology, College of Chemistry and Molecular Engineering, Peking University（北京化学与分子工程学院，应用物理与技术中心，北京分子科学国家实验室，放射化学与辐射化学基础科学实验室，北京大学）
