论文标题
高磁场中强烈的非线性抗铁磁动力学
Strongly nonlinear antiferromagnetic dynamics in high magnetic fields
论文作者
论文摘要
抗铁磁（AFM）材料由于其固有的超快自旋动力学，缺少流量场和较大的自旋传输效应，具有良好的超快数据处理潜力。然而，相同的特性使他们的操作变得困难，需要在TESLA的THZ范围和磁场中的频率。 AFM订单的切换意味着进入非线性策略，这是一个未开发的领域。在这里，我们使用来自自由电子激光器的THZ光将抗磁性NIO驱动到高度非线性方案中，并从33-Tesla苦力磁铁中使用磁场将其从非线性中转移出来。大型振幅动力学的演示代表了朝着AFM秩序超快共振转换的关键步骤。
Antiferromagnetic (AFM) materials possess a well-recognized potential for ultrafast data processing thanks to their intrinsic ultrafast spin dynamics, absence of stray fields, and large spin transport effects. The very same properties, however, make their manipulation difficult, requiring frequencies in THz range and magnetic fields of tens of Teslas. Switching of AFM order implies going into the nonlinear regime, a largely unexplored territory. Here we use THz light from a free electron laser to drive antiferromagnetic NiO into a highly nonlinear regime and steer it out of nonlinearity with magnetic field from a 33-Tesla Bitter magnet. This demonstration of large-amplitude dynamics represents a crucial step towards ultrafast resonant switching of AFM order.
