ASCENT Theme 2 Liaison Meeting / Ultrafast spin-orbit torque switching & Understanding switching dynamics of the insulator-metal transition in LaCoO3

"Ultrafast spin-orbit torque switching" Akshay Pattabi (Postdoctoral Researcher, UC Berkeley) Spin transfer torque can be used to electrically manipulate magnetic order in devices, but is typically limited to nanosecond timescales. Alternatively, spin–orbit torque can be employed, and switching with current pulses down to ~200 ps has been demonstrated. However, the upper limit to magnetization switching speed remains unestablished. Here, we show that photoconductive switches can be used to apply 6-ps-wide electrical pulses and deterministically switch the out-of-plane magnetization of a common thin cobalt film via spin–orbit torque. We probe the ultrafast magnetization dynamics due to spin–orbit torques with sub-picosecond resolution using the time-resolved magneto-optical Kerr effect (MOKE).

"Understanding switching dynamics of the insulator-metal transition in LaCoO3" Prof. Jeffrey Bokor (UC Berkeley)
LaCoO3 is a novel complex oxide material that shows considerable promise as a selector device in high density cross-point type memory arrays as well as an RF limiter. The physical processes that determine switching speed in this material are not well understood. In this talk, we will provide an update on the state of understanding and show recent progress in experimental studies to investigate this important issue.

Task: 2776.069: Probing Dynamics of Switching in IMT Oxides 

This meeting is only available to the JUMP research community, such as Principal Investigators, Postdoc researchers, Students, and Industry/Government liaisons.