Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Voltage control of magnetic domain wall injection in strain-mediated multiferroic heterostructures

Abstract

Effective control of the domain wall (DW) injection in the magnetic nanowires is of great importance for future novel device applications in spintronics, and currently rely on magnetization switching by the local external magnetic field obtained from metal contact lines or spin-transfer torque (STT) effect from spin-polarized current. However, the external field is an obstacle for realizing practical spintronic devices with all-electric operation, and high current density can occasionally damage the devices. In this work, voltage controlled in-plane magnetic DW injection into a magnetic nanowire in the strain-mediated multiferroic heterostructures is studied by means of fully coupled micromagnetic-mechanical Finite Element Method (FEM) simulations. We propose a engineered shaped nano-magnetic on piezoelectric thin film that a 180° magnetization rotation in the DW injection region accomplished with in-plane piezostrain and magnetic shape anisotropy, thereby, leading to a DW injection into the nanowire. In this architecture, we computationally demonstrate a repeated creation of DWs by voltage-induced strains without using any magnetic fields. Our FEM simulation results demonstrated an ultralow area energy consumption per injection (~52.48 mJ/m^2 ), which drastically lower than the traditional magnetic field and STT driven magnetization switching. A fast-overall injection time within ~3.4 ns under a continuous injection is also demonstrated. Further reduction of energy consumption and injection time can be achieved by optimization of the structure and material selections. The present design and computational analyses can provide an additional efficiency method to realize low-power and high-speed spintronics and magnonic devices.

Back to tab navigation

Article information


Submitted
01 Apr 2020
Accepted
21 May 2020
First published
22 May 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Paper

Voltage control of magnetic domain wall injection in strain-mediated multiferroic heterostructures

H. Zhou, S. Shi, D. Nian, S. Cui, J. Luo, Y. Qiu, H. Yang, M. Zhu and G. Yu, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/D0NR02595J

Social activity

Search articles by author

Spotlight

Advertisements