High-density N？el-type magnetic skyrmion phase stabilized at high temperature
- High-density N？el-type magnetic skyrmion phase stabilized at high temperature
- 민병철; 최준우; 장혜정; 송경미; 권희영; 정주영; Ah-Yeon Lee; Seung-Young Park; Jeehoon Kim; Changyeon Won
- Skyrmions; Lorentz TEM
- Issue Date
- NPG Asia Materials
- VOL 12, 86
- The discovery of a thermally stable, high-density magnetic skyrmion phase is a key prerequisite for realizing practical skyrmionic memory devices. In contrast to the typical low-density N？el-type skyrmions observed in technologically viable multilayer systems, with Lorentz transmission electron microscopy, we report the discovery of a high-density homochiral N？el-type skyrmion phase in magnetic multilayer structures that is stable at high temperatures up to 733 K (？460 °C). Micromagnetic simulations reveal that a high-density skyrmion phase can be stabilized at high temperature by deliberately tuning the magnetic anisotropy, magnetic field, and temperature. The existence of the high-density skyrmion phase in a magnetic multilayer system raises the possibility of incorporating chiral N？el-type skyrmions in ultrahighdensity spin memory devices. Moreover, the existence of this phase at high temperature shows its thermal stability, demonstrating the potential for skyrmion devices operating in thermally challenging modern electronic chips.
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