论文标题
Ni80fe20中的自旋波动操作的纳米通道纳米阵列
Nanochannels for Spin-Wave Manipulation in Ni80Fe20 Nanodot Arrays
论文作者
论文摘要
图案化的磁性纳米结构是未来能源有效的芯片通信设备的潜在候选者。在这里，我们在实验和数字上研究了纳米通道在NI80FE20连接的不同填充分数的Nanodot阵列中操纵自旋波的作用。在这些样品中观察到了丰富的自旋波光谱，其中自旋波模式的数量随着撤离场的裁员而填充分数的增加而减少。纳米通道通过偶极交换耦合影响连接点的自旋波模式。对于所有模式，垂直纳米渠道将纳米模型搭配起来，除了所有纳米渠道充当耦合器的最高频率模式。在模拟中进一步探索了此功能，该功能揭示了只有最高频率模式才能通过所有纳米通道传播，类似于电子弹能。这项研究将有助于了解纳米通道在模式的磁性纳米结构中的作用及其在基于自旋波的通信设备中的应用。
Patterned magnetic nanostructures are potential candidates for future energy efficient, on-chip communication devices. Here, we have experimentally and numerically studied the role of nanochannels to manipulate spin waves in Ni80Fe20 connected nanodot arrays of varying filling fraction. Rich spin-wave spectra are observed in these samples, where the number of spin-wave modes decreases with increasing filling fraction due to the retrenchment of the demagnetizing field. The nanochannels affect the spin-wave modes of the connected dots through dipole-exchange coupling. For all modes the vertical nanochannels couple the nanodots, except for the highest frequency modes where all nanochannels act as coupler. This feature is further explored in the simulation, which reveals that only the highest frequency mode can propagate through all the nanochannels, analogues to an electronic demultiplexer. This study will be useful to understand the role of nanochannels in patterned magnetic nanostructures and their applications in spin-wave based communication devices.
