Magnetic direct-write skyrmion nanolithography

Ognev, A.V. and Kolesnikov, Alexander and Kim, Yong Jin and Mohanty, Jyoti Ranjan and et al, . (2020) Magnetic direct-write skyrmion nanolithography. ACS Nano, 14 (11). pp. 14960-14970. ISSN 1936-0851

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Magnetic skyrmions are stable spin textures with quasi-particle behavior and attract significant interest in fundamental and applied physics. The metastability of magnetic skyrmions at zero magnetic field is particularly important to enable, for instance, a skyrmion racetrack memory. Here, the results of the nucleation of stable skyrmions and formation of ordered skyrmion lattices by magnetic force microscopy in (Pt/CoFeSiB/W)n multilayers, exploiting the additive effect of the interfacial Dzyaloshinskii-Moriya interaction, are presented. The appropriate conditions under which skyrmion lattices are confined with a dense two-dimensional liquid phase are identified. A crucial parameter to control the skyrmion lattice characteristics and the number of scans resulting in the complete formation of a skyrmion lattice is the distance between two adjacent scanning lines of a magnetic force microscopy probe. The creation of skyrmion patterns with complex geometry is demonstrated, and the physical mechanism of direct magnetic writing of skyrmions is comprehended by micromagnetic simulations. This study shows a potential of a direct-write (maskless) skyrmion (topological) nanolithography with sub-100 nm resolution, where each skyrmion acts as a pixel in the final topological image. © 2020 American Chemical Society.

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IITH Creators:
IITH CreatorsORCiD
Mohanty, Jyoti Ranjan
Item Type: Article
Additional Information: This work is supported by the Russian Foundation for Basic Research (Grant 17-52-45135) and INT/RUS/RFBR/P-273 grant, the Russian Ministry of Education and Science under the state task (0657-2020-0013) and the program of improvement of the competitiveness of Far Eastern Federal University (Agreement No. 075-02-2020-1584), by Act 211 of the Government of the Russian Federation (Contract No. 02.A03.21.0011). This work was partially supported by Era.Net RUS Plus (TSMFA), RFBR (Project No. 18-29-27026, 18-57-76001) and the scholarship of President of the Russian Federation for young scientists and graduate students (SP-350.2019.1). A.S.S. thanks the DAAD and the Russian Ministry of Education and Science (Agreement No. 075-03-2020-188/6) for funding a research stay at Johannes Gutenberg University, Mainz. The group in Mainz thanks the German Research Foundation (SPP2137 #403502522 and SFB TRR173 #268565370). This research was also supported by the National Research Foundation of Korea (2015 ...
Uncontrolled Keywords: Interfacial Dzyaloshinskii-Moriya interaction; Magnetic force microscopy; Perpendicular magnetic anisotropy; Skyrmion; Topological nanolithography
Subjects: Others > Nanotechnology
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 23 Nov 2022 09:33
Last Modified: 23 Nov 2022 09:33
Publisher URL: https://10.1021/acsnano.0c04748
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