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Volume 14 Issue 7, July 2019

Guiding spin waves in artificial antiferromagnets

Spin waves, which can propagate free of Joule heating, may act as the information carrier in future spintronic technology. In antiferromagnets (AFMs), spin waves are fast and insensitive to external magnetic fields, but current-induced excitation and control of the propagation is difficult to achieve. Liu et al. now explore spin waves in an artificial AFM structure, which consists of periodic 100-nm-wide stripe domains with alternating upward and downward magnetization. They excite high-frequency spin waves, which propagate along the strips. Furthermore, they can reorient the domain pattern by current pulses and, thereby, control the propagation direction of the spin waves. The cover art shows spin waves propagating within domains of opposite spin polarization as indicated by the yellow and purple arrows.

Article by Yu et al

IMAGE: Hanchen Wang and Haozhen Wang, Beihang University. COVER DESIGN: Bethany Vukomanovic


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Research Highlights

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News & Views

  • Grafting nanodroplets by surface-initiated atom transfer radical polymerization can be carried out at liquid–liquid interfaces.

    • Anna Carlmark
    News & Views
  • The development of devices that exploit the intrinsic properties of two-dimensional materials can provide opportunities for in-memory computing and area-efficient integrated circuits based on Moore’s law.

    • Du Xiang
    • Tao Liu
    • Wei Chen
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  • The combination of ferroelectrics and phase-change materials provides a route towards phase-change data storage at room temperature, without heating.

    • Robert E. Simpson
    News & Views
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Review Articles

  • This Review highlights the progress made so far in engineering nanomaterials for neurotechnology applications, from neuron signal sensing and modulation to brain stimulation, with an outlook on what these technologies can enable in the future.

    • Héctor Acarón Ledesma
    • Xiaojian Li
    • Bozhi Tian
    Review Article
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Amendments & Corrections

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