SPIN TEXTURES

Overview

We are interested in novel spin textures, especially those occurring in three-dimensional (3D) magnetic objects. Curvature, domain walls, 3D spin and space, topology are some of our daily words at work.  We design and fabricate devices, image their spin textures and influence these with spin-polarized currents or externally applied magnetic fields. The applied background includes the proposed concept of 3D race-track memory. This research topic is driven in close collaboration with colleagues in the Theory group, PFNC at Minatec, Institut Néel, and expert chemist groups in Germany and Spain.

Research topics

Spin textures by models

We investigate the existence, energetics and dynamics of 3D spin textures under magnetic field and spin-polarized current by using and developing our home-made feeLLGood micromagnetic code, combined with analytical modeling.

Spin textures by experiments

From nanowires to multilayered nanotubes, we observe samples compliant for spintronic devices. Probing the strength of a spin texture’s topological protection against transformation or annihilation is a major goal. We also contribute to the development of 3D MRAM (MRAM team).

Material research

We design and synthesize samples to stabilize 3D spin textures using bottom-up chemical synthesis (anodization, electroplating, electroless deposition, atomic layer deposition). We further use lithography/FIB for electrical contacting and design specific sample supports for original in-situ experiments.

Magnetic imaging

Magnetic imaging of 3D spin textures requires high spatial resolution (nanoscale) as well as bulk/surface and multi-component sensitivity. We are developing expertise in electron-, X-ray & near-field probes, both in the lab and at external facilities, including development of instruments and image data treatment.

The team

Former members

Post-docs

  • Sylvain MARTIN (2016-2018)

PhD

  • Michal STANO (2015-2018), Joint with Institut NEEL.
  • Beatrix TRAPP (2015-2018). Joint with Institut NEEL.
  • Alexis WARTELLE (2013-2017). Joint with Institut NEEL.

Internships

  • Ondrej NOVOTNI (2020)
  • Zied BELKHIRI (2020)
  • Hoel ROBERT (2018). Joint with INAC/MEM.

Projects

  • M3d, FP7 (2012-2016).
  • MILF, ANR (2019-2022).
  • C3DS, ANR-DFG (2019-2022).

Partners

Recent news

  • Theoretical study of current induced domain wall motion in magnetic nanotubes with azimuthal magnetization (April 12th, 2021)Theoretical study of current induced domain wall motion in magnetic nanotubes with azimuthal magnetization
    We report a theoretical overview of the magnetic domain wall behavior under an electric current in infinitely long nanotubes with azimuthal magnetization. We highlight effects that, besides spin-transfer torques already largely understood in flat strips, ...
  • Highlights of SPINTEC research in 2020 (December 10th, 2020)Highlights of SPINTEC research in 2020
    The research highlights of SPINTEC over the year 2020 have been put together, and are available to download: http://www.spintec.fr/spintec-annual-booklets. This booklet contains the key facts of the lab over the period (contracts, new staff etc.), the ...
  • Unveiling the heart of magnetic memory cells thanks to electron holography (November 10th, 2020)Unveiling the heart of magnetic memory cells thanks to electron holography
    Magnetic spintronic memory called STT-MRAM have recently entered in volume production at major microelectronic foundries. The research in this area is now focused on preparing the future memory generations with higher capacity, higher speed, lower ...
  • Masters thesis projects for Spring 2021 (September 15th, 2020)Masters thesis projects for Spring 2021
    You find here the list of proposals for Master-2 internships to take place at Spintec during Spring 2021. In most cases, these internships are intended to be suitable for a longer-term PhD work. Interested Master-1 ...
  • Room-Temperature Skyrmions at Zero Field in Exchange-Biased Ultrathin Films (July 17th, 2020)Room-Temperature Skyrmions at Zero Field in Exchange-Biased Ultrathin Films
    Magnetic skyrmions are topologically protected spin textures of great interest for nanoscale information storage and processing. However, stabilizing small skyrmions without applying an external magnetic field remains challenging. This study employs a thin ferromagnetic layer ...

Publications

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