The authors demonstrate that the inverse spin Hall effect (ISHE) and pure spin current relaxation in Ni80Fe20 (Py) are strong magnetization orientation dependent through longitudinal spin-Seebeck effect measurement in YIG/Cu/Py/Ir25Mn75 spin valve heterostructure. With the relative orientation of the magnetization of YIG and Py varying from perpendicular (⊥) to collinear (||), it has been found that the detected ISHE amplitude in 10 nm Py increases by 80%. Besides, the spin-diffusion length λsf varies from \(\lambda _{{\mathrm{sf}}}^ \bot\) = 1.0 ± 0.1 nm to \(\lambda _{{\mathrm{sf}}}^\parallel\) = 2.8 ± 0.5 nm and the effective spin Hall angle \(\theta _{{\mathrm{SH}}}^{{\mathrm{eff}}}\left( \bot \right)/\theta _{{\mathrm{SH}}}^{{\mathrm{eff}}}\left( \parallel \right) = 1.5\).
- Zhaozhao Zhu
- Xiaoli Zheng
- Jian-Wang Cai
