TY - JOUR
T1 - Joule Heating Effect on Field-Free Magnetization Switching by Spin-Orbit Torque in Exchange-Biased Systems
AU - Razavi, Seyed Armin
AU - Wu, Di
AU - Yu, Guoqiang
AU - Lau, Yong Chang
AU - Wong, Kin L.
AU - Zhu, Weihua
AU - He, Congli
AU - Zhang, Zongzhi
AU - Coey, J. M.D.
AU - Stamenov, Plamen
AU - Khalili Amiri, Pedram
AU - Wang, Kang L.
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/2/23
Y1 - 2017/2/23
N2 - Switching of magnetization via spin-orbit torque provides an efficient alternative for nonvolatile memory and logic devices. However, to achieve deterministic switching of perpendicular magnetization, an external magnetic field collinear with the current is usually required, which makes these devices inappropriate for practical applications. In this work, we examine the current-induced magnetization switching in a perpendicularly magnetized exchange-biased Pt/CoFe/IrMn system. A magnetic field annealing technique is used to introduce in-plane exchange biases, which are quantitatively characterized. Under proper conditions, field-free current-driven switching is achieved. We study the Joule heating effect, and we show how it can decrease the in-plane exchange bias and degrade the field-free switching. Furthermore, we discuss that the exchange-bias training effect can have similar effects.
AB - Switching of magnetization via spin-orbit torque provides an efficient alternative for nonvolatile memory and logic devices. However, to achieve deterministic switching of perpendicular magnetization, an external magnetic field collinear with the current is usually required, which makes these devices inappropriate for practical applications. In this work, we examine the current-induced magnetization switching in a perpendicularly magnetized exchange-biased Pt/CoFe/IrMn system. A magnetic field annealing technique is used to introduce in-plane exchange biases, which are quantitatively characterized. Under proper conditions, field-free current-driven switching is achieved. We study the Joule heating effect, and we show how it can decrease the in-plane exchange bias and degrade the field-free switching. Furthermore, we discuss that the exchange-bias training effect can have similar effects.
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U2 - 10.1103/PhysRevApplied.7.024023
DO - 10.1103/PhysRevApplied.7.024023
M3 - Article
AN - SCOPUS:85014752109
SN - 2331-7019
VL - 7
JO - Physical Review Applied
JF - Physical Review Applied
IS - 2
M1 - 024023
ER -