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Voltage-driven charge-mediated fast 180 degree magnetization switching in nanoheterostructure at room temperature

Yi, Min and Zhang, Hongbin and Xu, Bai-Xiang (2017):
Voltage-driven charge-mediated fast 180 degree magnetization switching in nanoheterostructure at room temperature.
In: npj Computational Materials, p. 38, 3, DOI: 10.1038/s41524-017-0043-x,
[Article]

Abstract

Voltage-driven 180° magnetization switching without electric current provides the possibility for revolutionizing the spintronics. We demonstrated the voltage-driven charge-mediated 180° magnetization switching at room temperature by combining first-principles calculations and temperature-dependent magnetization dynamics simulation. The electric field (E)-induced interface charge is found to allow a giant modulation of the magnetic anisotropy (K) of the nanomagnet. Particularly K is revealed to vary linearly with respect to E and the epitaxial strain. Magnetization dynamics simulations using the so-obtained K show that both in-plane and perpendicular 180° switching can be achieved by E pulses. The temperature effect renders the 180° switching as probability events. Statistical analysis indicates a fast (around 4 ns) and low-error-probability 180° switching achievable at room temperature by controlling the magnitude of E and the pulse width. The study inspires the rational design of miniaturized nanoscale spintronic devices where thermal fluctuation has a great impact.

Item Type: Article
Erschienen: 2017
Creators: Yi, Min and Zhang, Hongbin and Xu, Bai-Xiang
Title: Voltage-driven charge-mediated fast 180 degree magnetization switching in nanoheterostructure at room temperature
Language: English
Abstract:

Voltage-driven 180° magnetization switching without electric current provides the possibility for revolutionizing the spintronics. We demonstrated the voltage-driven charge-mediated 180° magnetization switching at room temperature by combining first-principles calculations and temperature-dependent magnetization dynamics simulation. The electric field (E)-induced interface charge is found to allow a giant modulation of the magnetic anisotropy (K) of the nanomagnet. Particularly K is revealed to vary linearly with respect to E and the epitaxial strain. Magnetization dynamics simulations using the so-obtained K show that both in-plane and perpendicular 180° switching can be achieved by E pulses. The temperature effect renders the 180° switching as probability events. Statistical analysis indicates a fast (around 4 ns) and low-error-probability 180° switching achievable at room temperature by controlling the magnitude of E and the pulse width. The study inspires the rational design of miniaturized nanoscale spintronic devices where thermal fluctuation has a great impact.

Journal or Publication Title: npj Computational Materials
Volume: 3
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Mechanics of functional Materials
11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 04 Oct 2017 08:55
DOI: 10.1038/s41524-017-0043-x
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