Theoretical studies of all-electric spintronics utilizing multiferroic and magnetoelectric materials

Tong, Wen‐Yi; Fang, Y.; Cai, Jianming; Gong, Shi-Jing; Duan, Chun‐Gang

doi:10.1016/j.commatsci.2015.07.016

Cited by 19 publications

(8 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 Compared with the control of degrees of freedom by the traditional magnetic field or the more advanced spin-current method, manipulation via purely electric means wins the most attention. [3][4][5][6][7] Over the past few years, the electric approach, with advantages of ultra-high speed and ultra-low power consumption, has been successfully applied in spintronics to control magnetic order, 8 domain structures, 9 spin polarization, 10,11 and even magnetization reversal. 12,13 It opens an emerging branch of spintronics, i.e., all-electric spintronics, and brings revolutions in the next-generation data storage.…”

Section: Introductionmentioning

confidence: 99%

Electrical control of the anomalous valley Hall effect in antiferrovalley bilayers

Tong

Duan

2017

npj Quant Mater

Self Cite

View full text Add to dashboard Cite

In analogy to all-electric spintronics, all-electric valleytronics, i.e., valley manipulation via electric means, becomes an exciting new frontier as it may bring revolutions in the field of data storage with ultra-high speed and ultra-low power consumption. The existence of the anomalous valley Hall effect in ferrovalley materials demonstrates the possibility of electrical detection for valley polarization. However, in previously proposed valley-polarized monolayers, the anomalous valley Hall effect is controlled by external magnetic fields. Here, through elaborate structural design, we propose the antiferrovally bilayer as an ideal candidate for realizing all-electric valleytronic devices. Using the minimal k·p model, we show that the energy degeneracy between valley indexes in such system can be lifted by electric approaches. Subsequently, the anomalous valley Hall effect strongly depends on the electric field as well. Taking the bilayer VSe 2 as an example, all-electric tuning and detecting of anomalous valley Hall effect is confirmed by density-functional theory calculations, indicating that the valley information in such antiferrovalley bilayer can be reversed by an electric field perpendicular to the plane of the system and easily probed through the sign of the Hall voltage.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrical control of the anomalous valley Hall effect in antiferrovalley bilayers

Tong

Duan

2017

npj Quant Mater

Self Cite

View full text Add to dashboard Cite

show abstract

“…The electric field control could be realized using different magnetoelectric effects (see, e.g. review refs 1 and 2 ), among which of a particular interest is the recently discovered effect of the voltage-controlled magnetic anisotropy (VCMA) 3 4 5 . The VCMA effect manifests itself as a variation of the perpendicular magnetic anisotropy at the interface between a ferromagnetic metal and an insulator under the application of an interface voltage.…”

mentioning

confidence: 99%

Excitation of propagating spin waves in ferromagnetic nanowires by microwave voltage-controlled magnetic anisotropy

Verba

Carpentieri

Finocchio

et al. 2016

Sci Rep

View full text Add to dashboard Cite

The voltage-controlled magnetic anisotropy (VCMA) effect, which manifests itself as variation of anisotropy of a thin layer of a conductive ferromagnet on a dielectric substrate under the influence of an external electric voltage, can be used for the development of novel information storage and signal processing devices with low power consumption. Here it is demonstrated by micromagnetic simulations that the application of a microwave voltage to a nanosized VCMA gate in an ultrathin ferromagnetic nanowire results in the parametric excitation of a propagating spin wave, which could serve as a carrier of information. The frequency of the excited spin wave is twice smaller than the frequency of the applied voltage while its amplitude is limited by 2 mechanisms: (i) the so-called “phase mechanism” described by the Zakharov-L’vov-Starobinets “S-theory” and (ii) the saturation mechanism associated with the nonlinear frequency shift of the excited spin wave. The developed extension of the “S-theory”, which takes into account the second limitation mechanism, allowed us to estimate theoretically the efficiency of the parametric excitation of spin waves by the VCMA effect.

show abstract

“…19,20 To avoid dissipation associated with transport, one can employ electric field control of magnetization. Such control can be realized via various magnetoelectric effects 21,22 and it has been demonstrated theoretically. 23,24 Since the modulation of anisotropy by strain is observed in many ferromagnetic materials, strain can also be used to control magnetization dynamics.…”

mentioning

confidence: 99%

Magnetic skyrmion bubble motion driven by surface acoustic waves

Nepal

Güngördü

Kovalev

2018

Applied Physics Letters

View full text Add to dashboard Cite

We study the dynamical control of a magnetic skyrmion bubble by using counter-propagating surface acoustic waves (SAWs) in a ferromagnet. First, we determine the bubble mass and derive the force due to SAWs acting on a magnetic bubble using Thiele's method. The force that pushes the bubble is proportional to the strain gradient for the major strain component. We then study the dynamical pinning and motion of magnetic bubbles by SAWs in a nanowire. In a disk geometry, we propose a SAWs-driven skyrmion bubble oscillator with two resonant frequencies.

show abstract

Theoretical studies of all-electric spintronics utilizing multiferroic and magnetoelectric materials

Cited by 19 publications

References 57 publications

Electrical control of the anomalous valley Hall effect in antiferrovalley bilayers

Electrical control of the anomalous valley Hall effect in antiferrovalley bilayers

Excitation of propagating spin waves in ferromagnetic nanowires by microwave voltage-controlled magnetic anisotropy

Magnetic skyrmion bubble motion driven by surface acoustic waves

Contact Info

Product

Resources

About