In this article, we analyze by modeling two possible mechanisms for magnetization switching using spin-orbit torques, which have been reported to cause field-free deterministic switching in experiments. Here we compare the field-free magnetization switching due to a tilt of the anisotropy direction against the use of an antiferromagnetic bias field. Simple results obtained analytically show that a bias field not only causes the magnetization reversal but also reduces the corresponding energy barrier. The critical current required for magnetization switching is analyzed on the basis of a macrospin model. It is shown that although the field-free deterministic switching caused by a tilt of the anisotropy is more robust than the bias field in the development of memory elements, a compromise between requirements has to be adopted when selecting the parameters for specific applications.
|Titolo:||A comparison of two different mechanisms for deterministic spin orbit torque magnetization switching|
SOARES, GABRIEL [Investigation]
PASQUALE, MASSIMO [Writing – Review & Editing]
|Data di pubblicazione:||2020|
|Appare nelle tipologie:||1.1 Articolo in rivista|