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Electric polarization reversal and memory in a multiferroic material induced by magnetic fields

机译：磁场诱导的多铁性材料中的极化反转和记忆

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Ferroelectric and magnetic materials are a time-honoured subject of study and have led to some of the most important technological advances to date. Magnetism and ferroelectricity are involved with local spins and off-centre structural distortions, respectively. These two seemingly unrelated phenomena can coexist in certain unusual materials, termed multiferroics(1-11). Despite the possible coexistence of ferroelectricity and magnetism, a pronounced interplay between these properties has rarely been observed(6,12). This has prevented the realization of multiferroic devices offering such functionality(13). Here, we report a striking interplay between ferroelectricity and magnetism in the multiferroic TbMn2O5, demonstrated by a highly reproducible electric polarization reversal and permanent polarization imprint that are both actuated by an applied magnetic field. Our results point to new device applications such as magnetically recorded ferroelectric memory.
机译：铁电和磁性材料是一个历史悠久的研究主题，并导致了迄今为止最重要的一些技术进步。磁性和铁电分别与局部自旋和偏心结构变形有关。这两种看似无关的现象可以共存于某些称为多铁磁（1-11）的特殊材料中。尽管铁电和磁性可能共存，但很少观察到这些性质之间的显着相互作用（6,12）。这阻碍了提供这种功能的多铁性设备的实现（13）。在这里，我们报告了多铁性TbMn2O5中铁电与磁性之间的显着相互作用，这由高度可复制的极化反转和永久极化烙印所证实，两者均由施加的磁场驱动。我们的结果指向了新的设备应用，例如磁记录铁电存储器。

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