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Magnetic skyrmions are topologically nontrivial, swirling spin configurations that arise due to Dzyaloshinskii-Moriya (DM) interactions in noncentrosymmetric materials with a helical magnetic ground state, such as B20 metal silicides and germanides. Their existence was a long-standing prediction until first observations were made in 2009 on helimagnetic films. Since this breakthrough, the experimental and theoretical study of skyrmions has emerged as a major focus of magnetism research. This strong interest is motivated largely by several favorable properties that make skyrmions attractive as carriers of information in high density magnetic storage media. These properties include their stability, nanometer-scale size, and the ultra-low electrical current density required to move them compared with conventional magnetic domain walls. Until now, however, skyrmions have not been observed at room-temperature or at magnetic fields low enough for practical applications. Further research into new and engineered materials, specifically conceived to host skyrmions under practical conditions, is required. The goal of the proposed symposium is to promote and encourage exactly this kind of work in a timely fashion. We will bring together an interdisciplinary group of researchers in materials science, physics, and device engineering who are interested in this emerging field and work on both the materials engineering aspects and the fundamental physics of magnetic skyrmions. The choice of possible magnetic materials is restricted by the fact that stable skyrmion phases require the DM interaction and non-centrosymmetric crystal symmetries. For this reason, most experiments have focused on materials such as MnSi, Fe1-xCoxSi, FeGe, or MnGe with B20 structure. New materials could be discovered. It should also be possible, however, to engineer materials and nanostructures that take use surface-induced chiral exchange or other interactions to stabilize skyrmion phases beyond the low-temperature and high-field regime. The symposium will therefore cover a wide variety of skyrmion host-materials, in bulk, thin-film, and nanostructured form that are grown using MBE and CVD, or fabricated using a top-down approach. Measurement techniques such as Lorentz transmission electron microscopy (LTEM), topological Hall effect (THE) and other transport measurements, and SQUID magnetometry will be included, as well as more recently developed techniques. Theoretical calculations and potential architectures for future applications will also be considered.

征稿信息

重要日期

2016-06-16
摘要截稿日期

征稿范围

Topics will include:

  • New materials that host magnetic skyrmions

  • Rational design and growth of materials and nanostructures for stabilized skyrmion phase

  • Skyrmions in confined geometries

  • Skyrmion dynamics and control

  • Conceptual device designs to detect, manipulate and control skyrmions

  • New probing techniques and methods

  • Theoretical and numerical approaches for designing materials/structures and understanding behaviors

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重要日期
  • 会议日期

    11月27日

    2016

    12月02日

    2016

  • 06月16日 2016

    摘要截稿日期

  • 12月02日 2016

    注册截止日期

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