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arXiv 1008.3290cond-mat.str-el
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多铁性中的平移畴

Translation domains in multiferroics

D. Meier, N. Leo, T. Jungk, E. Soergel, P. Becker, L. Bohaty, M. Fiebig

摘要:

在两种类型的多铁性,但不是在相应的序参量的方向不同的翻译域解决。Hisperonal(h-)YMnO $_3$是一种分裂序参量多铁性材料,其中相称的铁电平移畴通过压电响应力显微镜分辨,而MnWO $_4$是一种联合序参量多铁性材料,其中无公度的磁平移畴通过光学二次谐波产生观察。在这些多铁性材料中,通常相当“隐藏”的平移域的显著表现和相关的对称性的急剧减少强调了在讨论多铁性材料的物理性质和功能时,平移域的存在不能被忽视。

英文摘要:

Translation domains differing in the phase but not in the orientation of the corresponding order parameter are resolved in two types of multiferroics. Hexagonal (h-) YMnO$_3$ is a split-order-parameter multiferroic in which commensurate ferroelectric translation domains are resolved by piezoresponse force microscopy whereas MnWO$_4$ is a joint-order-parameter multiferroic in which incommensurate magnetic translation domains are observed by optical second harmonic generation. The pronounced manifestation of the generally rather "hidden" translation domains in these multiferroics and the associated drastic reduction of symmetry emphasize that the presence of translation domains must not be neglected when discussing the physical properties and functionalities of multiferroics.

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