W91NF1310107 Progress Report for 10/01/2013 ~ 9/30/2014
Abstract
Previously we reported a novel mechanism to move domain walls with nanosecond long current pulses in perpendicularly magnetized thin films that are formed from multilayers composed of atomically thin cobalt and nickel layers, that are formed on heavy metal underlayers such as platinum(or iridium or palladium) and/or have heavy metal overlayers. This mechanism, which we entitled achiral spin torque (CST), arises from spin-orbit interactions in perpendicularly magnetized, ultrathin films that display chiral domain walls (DWs). The chirality of the domain walls is set by an exchange interaction of magnetic layers that display perpendicular magnetic anisotropy (PMA) at the interface with the heavy metal layer. The chiral spin torque (CST) is distinct from conventional spin transfer torque (STT) and provides a very efficient mechanism to manipulate DWs motion in nanowires for Racetrack Memory, the focus of our program [1,2].
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2014
- Accession Number
- AD1183944
Entities
Organizations
- International Business Machines Corporation (Armonk, NY)