We present experimental results and macrospin simulations of the switching characteristics of orthogonal spin-transfer devices incorporating an out-of-plane magnetized polarizing layer and an in-plane magnetized spin valve device at cryogenic temperatures. At T=4 K we demonstrate: high speed deterministic switching at short pulse lengths - down to 100 ps - with sufficient measurement statistics to establish a switching error rate of 10−5; coherent precessional switching at longer times; and ensemble decoherence effects at even longer times. Finite temperature macrospin models capture the precessional switching well but fail to fully reproduce all the decoherence and switching error behavior.
@article{arxiv.1711.10575,
title = {Coherent spin-transfer precession switching in orthogonal spin-torque devices},
author = {Graham E. Rowlands and Colm A. Ryan and Li Ye and Laura Rehm and Daniele Pinna and Andrew D. Kent and Thomas A. Ohki},
journal= {arXiv preprint arXiv:1711.10575},
year = {2017}
}