X射线极化增强形貌术研究Ni $_3$ V $_2$ O $_8$中多铁畴的电场控制
Electric field control of multiferroic domains in Ni$_3$V$_2$O$_8$ imaged by X-ray polarization enhanced topography
摘要：
用非共振X射线磁散射研究了多铁性NiPDMATHABMM V $_2$ O $_8$的磁结构。入射的圆偏振X射线结合全偏振分析的散射光束示出产生高灵敏度的摆线磁顺序的组件，包括它们的相对相位。在铁电相的磁结构上的新信息，它被发现，在“交叉领带”网站上的磁矩淬火相对于那些“脊柱”网站。这意味着铁电性的发生主要与脊柱网站磁序。我们还表明，我们的技术，使成像的多铁性域通过极化增强地形。这种方法是用来成像的域作为样品是由一个电场循环通过其磁滞回线，揭示了域的逐渐切换没有成核。
英文摘要：
The magnetic structure of multiferroic Ni$_3$V$_2$O$_8$ has been investigated using non-resonant X-ray magnetic scattering. Incident circularly polarized X-rays combined with full polarization analysis of the scattered beam is shown to yield high sensitivity to the components of the cycloidal magnetic order, including their relative phases. New information on the magnetic structure in the ferroelectric phase is obtained, where it is found that the magnetic moments on the "cross-tie" sites are quenched relative to those on the "spine" sites. This implies that the onset of ferroelectricity is associated mainly with spine site magnetic order. We also demonstrate that our technique enables the imaging of multiferroic domains through polarization enhanced topography. This approach is used to image the domains as the sample is cycled by an electric field through its hysteresis loop, revealing the gradual switching of domains without nucleation.
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