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Magnetic Direct-Write Skyrmion Nanolithography.

A V Ognev1, A G Kolesnikov1, Yong Jin Kim2

  • 1School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.

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|November 5, 2020
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Summary
This summary is machine-generated.

Researchers demonstrate direct magnetic writing of stable magnetic skyrmions and lattices using magnetic force microscopy. This maskless nanolithography technique offers sub-100 nm resolution for topological data storage.

Keywords:
interfacial Dzyaloshinskii−Moriya interactionmagnetic force microscopyperpendicular magnetic anisotropyskyrmiontopological nanolithography

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Magnetic skyrmions are topologically protected spin textures with quasi-particle properties.
  • Their stability at zero magnetic field is crucial for applications like skyrmion racetrack memory.
  • The interfacial Dzyaloshinskii-Moriya interaction (DMI) is key to controlling skyrmion behavior.

Purpose of the Study:

  • To investigate the nucleation of stable magnetic skyrmions and ordered skyrmion lattices.
  • To explore the formation of skyrmion lattices confined within a 2D liquid phase.
  • To demonstrate direct-write (maskless) skyrmion nanolithography.

Main Methods:

  • Utilized magnetic force microscopy (MFM) on (Pt/CoFeSiB/W) multilayers.
  • Exploited the additive effect of interfacial Dzyaloshinskii-Moriya interaction (DMI).
  • Employed micromagnetic simulations to understand the physical mechanism of skyrmion writing.

Main Results:

  • Achieved nucleation of stable skyrmions and formation of ordered skyrmion lattices.
  • Identified conditions for confining skyrmion lattices within a dense 2D liquid phase.
  • Demonstrated creation of complex skyrmion patterns with sub-100 nm resolution.
  • Determined the critical role of MFM scanning line distance in controlling lattice characteristics.

Conclusions:

  • Established a direct-write, maskless nanolithography technique for magnetic skyrmions.
  • Showcased the potential for creating topological images with skyrmions acting as pixels.
  • Highlighted the feasibility of sub-100 nm resolution skyrmion pattern generation for advanced data storage.