TY - JOUR
T1 - Electric-field-driven deterministic and robust 120° magnetic rotation in a concave triangular nanomagnet electric-field-driven ren ci peng et al.
AU - Peng, Ren Ci
AU - Chen, Long Qing
AU - Zhou, Ziyao
AU - Liu, Ming
AU - Nan, Ce Wen
N1 - Funding Information:
This work is supported by the National Key R&D Program of China (Grant No. 2018YFB 0407601), the Natural Science Foundation of China (Grants No. 51902247 and No. 51788104), the National Basic Research Program of China (Grant No. 2016YFA0300103), the NSF (Grant No. DMR-1410714). R.-C.P. is also sponsored by China Postdoctoral Science Foundation (Grants No. 2019TQ0245 and No. 2019M663694) and Basic Research Program of Natural Science Foundation of Shanxi Province (Grant No. 2020JQ-059). This work also uses the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by the National Science Foundation Grant No. TG-DMR170006. This work is also supported by the High Performance Computing (HPC) Platform at Xi'an Jiaotong University. We also appreciate Dr Tiannan Yang from the Pennsylvania State University for his helpful suggestions.
Publisher Copyright:
© 2020 American Physical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6
Y1 - 2020/6
N2 - Deterministic magnetic switching driven by electric fields rather than power-dissipating currents at the nanoscale is fundamentally challenging yet promising for applications to energy-efficient and high-density spintronic devices. Here, we demonstrate an electric-field-controlled deterministic, robust and repeatable 120o rotation of "Y"-like magnetic state in a patterned nanoscale multiferroic heterostructure consisting of a concave triangular nanomagnet deposited on Pb(Mg1/3Nb2/3)O3-PbTiO3 film. Using phase-field simulations, we find that the rotation of "Y"-like magnetic state is controlled by a co-action of strain-mediated electric-field-induced uniaxial magnetoelastic anisotropy, magnetic in-plane shape anisotropy of the concave-triangle-shaped nanomagnet, and an interfacial exchange-bias field from a juxtaposed antiferromagnetic layer. It is also shown that deterministic magnetic state switching can be accomplished by a pulsed strain, the duration of which can span from ten nanoseconds or longer down to a few nanoseconds, providing great design flexibility. We also discuss the dynamics of electric-field-driven switching of "Y"-like magnetic state as well as the influence of side length, thickness, and shape variation (i.e., concave radius) of the nanomagnet on the critical strain for the switching. These results offer a technologically viable route to designing nanomagnet-based nonvolatile spin memories with high density and low power.
AB - Deterministic magnetic switching driven by electric fields rather than power-dissipating currents at the nanoscale is fundamentally challenging yet promising for applications to energy-efficient and high-density spintronic devices. Here, we demonstrate an electric-field-controlled deterministic, robust and repeatable 120o rotation of "Y"-like magnetic state in a patterned nanoscale multiferroic heterostructure consisting of a concave triangular nanomagnet deposited on Pb(Mg1/3Nb2/3)O3-PbTiO3 film. Using phase-field simulations, we find that the rotation of "Y"-like magnetic state is controlled by a co-action of strain-mediated electric-field-induced uniaxial magnetoelastic anisotropy, magnetic in-plane shape anisotropy of the concave-triangle-shaped nanomagnet, and an interfacial exchange-bias field from a juxtaposed antiferromagnetic layer. It is also shown that deterministic magnetic state switching can be accomplished by a pulsed strain, the duration of which can span from ten nanoseconds or longer down to a few nanoseconds, providing great design flexibility. We also discuss the dynamics of electric-field-driven switching of "Y"-like magnetic state as well as the influence of side length, thickness, and shape variation (i.e., concave radius) of the nanomagnet on the critical strain for the switching. These results offer a technologically viable route to designing nanomagnet-based nonvolatile spin memories with high density and low power.
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U2 - 10.1103/PhysRevApplied.13.064018
DO - 10.1103/PhysRevApplied.13.064018
M3 - Article
AN - SCOPUS:85090904719
VL - 13
JO - Physical Review Applied
JF - Physical Review Applied
SN - 2331-7019
IS - 6
M1 - 064018
ER -