论文标题
纳米磁磁性波导中自旋钉夹和自旋波分散体的温度依赖性
Temperature dependence of spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
论文作者
论文摘要
由于可能利用编码为自旋波相的信息或振幅对纳米级进行计算操作的可能性，因此镁化领域引起了极大的关注。最近，在Yttrium铁石榴石（YIG）波导中研究了自旋波，其宽度低至50 nm，而宽度比厚度远高于宽度。在下面发现了一个临界宽度，在此下面，交换相互作用抑制了偶极固定现象，并且系统未施加。在这里，我们继续进行这些研究，并分析固定现象和自旋波分散体，这是温度，厚度和选择的材料的函数。讨论了高阶模式，有限波形沿波导的影响以及固定现象对自旋波寿命的影响以及梯形横截面和波导的边缘粗糙度的影响。 The presented results are of particular interest for potential applications in magnonic devices and the incipient field of quantum magnonics at cryogenic temperatures.
The field of magnonics attracts significant attention due to the possibility of utilizing information coded into the spin-wave phase or amplitude to perform computation operations on the nanoscale. Recently, spin waves were investigated in Yttrium Iron Garnet (YIG) waveguides with widths ranging down to 50 nm and aspect ratios thickness over width approaching unity. A critical width was found, below which the exchange interaction suppresses the dipolar pinning phenomenon and the system becomes unpinned. Here we continue these investigations and analyse the pinning phenomenon and spin-wave dispersions as a function of temperature, thickness and material of choice. Higher order modes, the influence of a finite wavevector along the waveguide and the impact of the pinning phenomenon on the spin-wave lifetime are discussed as well as the influence of a trapezoidal cross section and edge roughness of the waveguides. The presented results are of particular interest for potential applications in magnonic devices and the incipient field of quantum magnonics at cryogenic temperatures.
