Figure 1
From: Spin–orbit torques in normal metal/Nb/ferromagnet heterostructures
Magnetic and SOT properties for the Nb/CoFeB/MgO/Ta films. (a) Values of effective anisotropy energy Keff as a function of \({t}_{Nb}\). The inset is the schematic of the easy axis of the CoFeB layer. (b) Schematic of the Hall bar structure to measure spin Hall properties. (c) \({\xi }_{DL}^{Nb}\) and \({\xi }_{FL}^{Nb}\) as a function of \({t}_{Nb}\) for each with varying Nb thickness in the PMA samples. (d) \({\xi }_{DL}^{Nb}\) and \({\xi }_{FL}^{Nb}\) as a function of \({t}_{Nb}\) using film structures with 2 nm thick CoFeB layers exhibiting IMA. (e) Resistivity of Nb layer as a function of \({t}_{Nb}\) in PMA (blue points) and IMA structures (green points), respectively. (f) Current induced-SOT switching curve of Nb/CoFeB/MgO/Ta devices.
