6533b82cfe1ef96bd128fd9b
RESEARCH PRODUCT
Current induced chiral domain wall motion in CuIr/CoFeB/MgO thin films with strong higher order spin–orbit torques
Alexander KronenbergM. FilianinaSanghyun JiSanghyun JiRobert M. ReeveSamridh JaiswalSamridh JaiswalMyung-hwa JungKyujoon LeeF. MartinMathias KläuiGerhard Jakobsubject
010302 applied physicsPhysicsPhysics and Astronomy (miscellaneous)Condensed matter physicsSpinsField (physics)02 engineering and technologySpin structure021001 nanoscience & nanotechnology01 natural sciencesMagnetizationDomain wall (magnetism)0103 physical sciencesDomain (ring theory)HarmonicCondensed Matter::Strongly Correlated Electrons0210 nano-technologySpin-½description
We investigate the Dzyaloshinskii–Moriya interaction (DMI) and spin–orbit torque effects in CuIr/CoFeB/MgO heterostructures. To this end, harmonic Hall measurements and current induced domain wall motion experiments are performed. The motion of domain walls at zero applied field due to current demonstrates the presence of DMI in this system. We determine the strength of the DMI to be D = + 5 ± 3 μ J / m 2 and deduce right-handed chirality in domain walls showing a partial Neel type spin structure. To ascertain the torques, we perform a second harmonic measurement to quantify the damping- and field-like current induced effective fields as a function of the magnetization direction. From the angular dependent analysis, we identify non-negligible higher order terms for polar magnetization angles θ > 0, which need to be included when considering the effective manipulation of spins by current.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-03-30 | Applied Physics Letters |