TY - JOUR
T1 - Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation
AU - Yu, Guoqiang
AU - Upadhyaya, Pramey
AU - Wong, Kin L.
AU - Jiang, Wanjun
AU - Alzate, Juan G.
AU - Tang, Jianshi
AU - Amiri, Pedram Khalili
AU - Wang, Kang L.
PY - 2014/3/25
Y1 - 2014/3/25
N2 - The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.
AB - The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.
UR - http://www.scopus.com/inward/record.url?scp=84898740024&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898740024&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.89.104421
DO - 10.1103/PhysRevB.89.104421
M3 - Article
AN - SCOPUS:84898740024
VL - 89
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
M1 - 104421
ER -