论文标题
$ \ rm {\ mathbf {fe}} _ {\ MathBf {3}} \ rm {\ MathBf {O}} _ {\ Mathbf {\ Mathbf {4}} $
Spin Seebeck effect and magnon diffusion length in $\rm{\mathbf{Fe}}_{\mathbf{3}}\rm{\mathbf{O}}_{\mathbf{4}}$
论文作者
论文摘要
镁扩散长度（MDL）的测定对于提高使用非金属磁体的基于自旋的Seebeck效应（SSE）设备的效率很重要。我们以$ 50 $和$ 300 \，\ rm {k} $提取MDL中的$ \ rm {fe} _ {3} \ rm {o} _ {4} $从使用弹性中子散射（sex）中获得的镁质分散体，并在错误内找到它们。然后，我们测量了$ \ rm {fe} _ {3} \ rm {o} _ {4} $薄膜的$ \ rm {fe} _ {3} _ {3} _ {fe} _ {fe} _ {o} $薄膜的平面磁化标准化的热通量的磁化，并通过对SSE的静态磁化贡献在厚度依赖MDL之前对SSE造成贡献。我们发现，以这种方式确定的MDL小于从INS中测量的MDL，这可能是由于大量和薄膜之间的强元传播差异造成的，$ \ rm {fe} _ {3} \ rm {o} _ {4} $。
The determination of the magnon diffusion length (MDL) is important for increasing the efficiency of spin Seebeck effect (SSE) based devices utilising non-metallic magnets. We extract the MDL at $50$ and $300\,\rm{K}$ in an $\rm{Fe}_{3}\rm{O}_{4}$ single crystal from the magnon dispersion obtained using inelastic neutron scattering (INS) and find them to be equal within error. We then measure the heat flux normalised SSE responses and in-plane magnetization of $\rm{Fe}_{3}\rm{O}_{4}$ thin films and normalise by the static magnetization contribution to the SSE before determining the MDLs from a fit of the thickness dependence. We find that the MDLs determined in this way are smaller than that measured from INS which maybe due to differences in magnon propagation between bulk and thin film $\rm{Fe}_{3}\rm{O}_{4}$.
