论文标题
横向PT中的本地和非本地旋转Seebeck效果-U \ Mathrm {CR_2O_3} $ - pt设备在低温下
Local and nonlocal spin Seebeck effect in lateral Pt-$\mathrm{Cr_2O_3}$-Pt devices at low temperatures
论文作者
论文摘要
我们研究了在低温下在抗铁磁性$α$ - $ \ mathrm {CR_2O_3} $和pt的抗铁磁性$α$α$α$α$α$α$α$α$α$α$α$α$α$α$α$α$α$ - $ sSE和pt中研究的热驱动的镁旋转传输（SSE旋转Seebeck效果（SSE SSE），我们研究了热驱动$α$ - $ \ MATHRM {CR_2O_3} $和PT的PT PT）监测局部和非局部SSE信号的幅度是温度的函数，我们发现既随着温度的升高，并且分别消失了100 K和20 K以上。此外，两个SSE信号均显示在低温下饱和。非局部SSE信号呈指数衰减，以呈中间喷射器检测器分离，这与弛豫状态中的镁自旋电流传输一致。我们估计$α$ - $ \ MATHRM {CR_2O_3} $胶片的木蛋白松弛长度约为3 k的500 nm。此短木蛋白放松长度以及SSE信号的强温度依赖性表明温度依赖于弹性的磁蛋白散射过程在IntermedMidemide Magnon Rangon范围内起重要作用。我们的观察结果与涉及热镁生成和运输的逻辑设备低衰减有关。
We have studied thermally driven magnon spin transport (spin Seebeck effect, SSE) in heterostructures of antiferromagnetic $α$-$\mathrm{Cr_2O_3}$ and Pt at low temperatures. Monitoring the amplitude of the local and nonlocal SSE signals as a function of temperature, we found that both decrease with increasing temperature and disappear above 100 K and 20 K, respectively. Additionally, both SSE signals show a tendency to saturate at low temperatures. The nonlocal SSE signal decays exponentially for intermediate injector-detector separation, consistent with magnon spin current transport in the relaxation regime. We estimate the magnon relaxation length of our $α$-$\mathrm{Cr_2O_3}$ films to be around 500 nm at 3 K. This short magnon relaxation length along with the strong temperature dependence of the SSE signal indicates that temperature-dependent inelastic magnon scattering processes play an important role in the intermediate range magnon transport. Our observation is relevant to low-dissipation antiferromagnetic magnon memory and logic devices involving thermal magnon generation and transport.
