Voltage control of skyrmions: Creation, annihilation, and zero-magnetic field stabilization

Yifan Zhou, Rhodri Mansell*, Sebastiaan van Dijken

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

Voltage manipulation of skyrmions is a promising path toward low-energy spintronic devices. Here, voltage effects on skyrmions in a GdOx/Gd/Co/Pt heterostructure are observed experimentally. The results show that the skyrmion density can be both enhanced and depleted by the application of an electric field, along with the ability, at certain magnetic fields to completely switch the skyrmion state on and off. Further, a zero magnetic field skyrmion state can be stabilized at a negative bias voltage using a defined voltage and magnetic field sequence. The voltage effects measured here occur on a few-second timescale, suggesting an origin in voltage-controlled magnetic anisotropy rather than ionic effects. By investigating the skyrmion nucleation rate as a function of temperature, we extract the energy barrier to skyrmion nucleation in our sample. Further, micromagnetic simulations are used to explore the effect of changing the anisotropy and Dzyaloshinskii-Moriya interaction on skyrmion density. Our work demonstrates the control of skyrmions by voltages, showing functionalities desirable for commercial devices.

AlkuperäiskieliEnglanti
Artikkeli172409
Sivumäärä5
JulkaisuApplied Physics Letters
Vuosikerta118
Numero17
DOI - pysyväislinkit
TilaJulkaistu - 26 huhtikuuta 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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