Niklas Roschewsky
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View article: Large spin-orbit torque generated by amorphous iron silicide
Large spin-orbit torque generated by amorphous iron silicide Open
Spin-orbit torque (SOT) shows great potential for next-generation memory technology. Conventionally, the underlying physics of SOT has been associated with heavy (high-Z) elements and/or intrinsic bandstructure. Here, we report large spin-…
View article: Resonant Enhancement of Exchange Coupling for Voltage-Controlled Magnetic Switching
Resonant Enhancement of Exchange Coupling for Voltage-Controlled Magnetic Switching Open
We propose an electric-field-controlled mechanism for magnetization switching\nassisted solely by the interlayer-exchange coupling (IEC) between the fixed and\nthe free magnets, which are separated by two oxide barriers sandwiching a\nspac…
View article: Spin-orbit torque generated by amorphous Fe$_{x}$Si$_{1-x}$
Spin-orbit torque generated by amorphous Fe$_{x}$Si$_{1-x}$ Open
While tremendous work has gone into spin-orbit torque and spin current generation, charge-to-spin conversion efficiency remains weak in silicon to date, generally stemming from the low spin-orbit coupling (low atomic number, Z) and lack of…
View article: Electric-Field Control of the Interlayer Exchange Coupling for Magnetization Switching
Electric-Field Control of the Interlayer Exchange Coupling for Magnetization Switching Open
We propose an electric-field-controlled mechanism for magnetization switching assisted solely by the interlayer-exchange coupling (IEC) between the fixed and the free magnets, which are separated by two oxide barriers sandwiching a spacer …
View article: Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures
Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures Open
Here, harmonic measurements of the longitudinal and transverse voltages in Bi-Sb/Co bilayers are presented. A large second harmonic voltage signal due to the ordinary Nernst effect is observed. In experiments where a magnetic field is rota…
View article: Spin-orbit torque switching of ultralarge-thickness ferrimagnetic GdFeCo
Spin-orbit torque switching of ultralarge-thickness ferrimagnetic GdFeCo Open
So far, studies of spin-orbit torques (SOT) in ferromagnets with\nperpendicular magnetic anisotropy (PMA) have been restricted to ultra thin\nsamples, while a systematic study of its thickness dependence is still lacking\nin literature. In…
View article: Spin-orbit torques in ferrimagnetic GdFeCo alloys
Spin-orbit torques in ferrimagnetic GdFeCo alloys Open
The spin-orbit torque switching of ferrimagnetic Gdx(Fe90Co10)100−x films was studied for both transition metal (TM)-rich and rare earth (RE)-rich configurations. The spin-orbit torque driven magnetization switching follows the same sense …