Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet.
Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet.
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DOI：
10.1038/ncomms15252
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发表时间：
2017-05-08
影响因子：
16.6
通讯作者：
Onose Y
中科院分区：
文献类型：
--
作者：
Iguchi Y;Nii Y;Onose Y
在许多当代技术中，通过外场控制物理性质是必不可少的。例如，可以通过场效应晶体管中的栅极电场来控制电导，场效应晶体管是集成电路的主要部件。由电场引起的光学现象，例如电致发光和电致变色，对于显示器和其他技术是有用的。微波传播的控制对于未来的无线通信技术也是重要的。固体中的微波性质主要由磁激发控制，而磁激发不容易由电场控制。这个问题的一个解决方案是使用磁感应铁电体（多铁性）。在这里，我们表明，微波非互易性，即不同的折射率的微波传播方向相反，可以通过外部电场在多铁性helimagnet Ba2Mg2Fe12O22逆转。这种方法为微波特性的电气控制提供了一种途径。微波传播控制是未来通信技术的重要组成部分。在这里，Iguchi等人报道了在多铁性helimagnet Ba2Mg2Fe12O22中通过外部电场逆转微波非互易性。
The control of physical properties by external fields is essential in many contemporary technologies. For example, conductance can be controlled by a gate electric field in a field effect transistor, which is a main component of integrated circuits. Optical phenomena induced by an electric field such as electroluminescence and electrochromism are useful for display and other technologies. Control of microwave propagation is also important for future wireless communication technology. Microwave properties in solids are dominated mostly by magnetic excitations, which cannot be easily controlled by an electric field. One solution to this problem is to use magnetically induced ferroelectrics (multiferroics). Here we show that microwave nonreciprocity, that is, different refractive indices for microwaves propagating in opposite directions, could be reversed by an external electric field in a multiferroic helimagnet Ba2Mg2Fe12O22. This approach offers an avenue for the electrical control of microwave properties. Control of microwave propagation is important for future communication technology. Here, Iguchi et al. report the reversal of microwave nonreciprocity by an external electric field in a multiferroic helimagnet Ba2Mg2Fe12O22.