Single-shot all-optical switching of magnetization in Tb/Co multilayer-based electrodes.

ABSTRACT: Ever since the first observation of all-optical switching of magnetization in the ferrimagnetic alloy GdFeCo using femtosecond laser pulses, there has been significant interest in exploiting this process for data-recording applications. In particular, the ultrafast speed of the magnetic reversal can enable the writing speeds associated with magnetic memory devices to be potentially pushed towards THz frequencies. This work reports the development of perpendicular magnetic tunnel junctions incorporating a stack of Tb/Co nanolayers whose magnetization can be all-optically controlled via helicity-independent single-shot switching. Toggling of the magnetization of the Tb/Co electrode was achieved using either 60 femtosecond-long or 5 picosecond-long laser pulses, with incident fluences down to

SUBMITTER: Aviles-Felix L 

PROVIDER: S-EPMC7089968 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature