What is it about?
Spin-wave computing, a potential successor to CMOS-based technologies, relies on the efficient manipulation of spin waves (also called magnons) for information processing. While basic logic devices such as magnon transistors, gates, and adders have been experimentally demonstrated, the challenge for complex two-dimensional magnonic circuits lies in steering spin waves through sharp turns. In this study, we demonstrate that dipolar (long-wavelength) spin waves can propagate through 90° turns without distortion.
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Why is it important?
Most spin-wave experiments rely on large external magnet to set a homogeneous magnetic field within the sample. For on-chip design, use of energy efficient technologies is important, and therefore zero-field spin-wave propagation is required. Moreover, spin waves exhibit anisotropic behaviour in in-plane magnetized layers, which poses a great challenge for uniform propagation in 2D circuits. We address this challenge by special design and fabrication procedure of the spin-wave waveguides which results in a non-trivial in-plane magnetization landscape.
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This page is a summary of: Zero-field spin wave turns, Applied Physics Letters, March 2024, American Institute of Physics,
DOI: 10.1063/5.0189394.
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