High-density N?el-type magnetic skyrmion phase stabilized at high temperature

Title
High-density N?el-type magnetic skyrmion phase stabilized at high temperature
Authors
민병철최준우장혜정송경미권희영정주영Ah-Yeon LeeSeung-Young ParkJeehoon KimChangyeon Won
Keywords
Skyrmions; Lorentz TEM
Issue Date
2020-12
Publisher
NPG Asia Materials
Citation
VOL 12, 86
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/72753
ISSN
1884-4049
Appears in Collections:
KIST Publication > Article
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