AI Article Synopsis

  • Scientists studied how tiny particles called magnons, which carry spin information, move in a special type of material called MgAlFeO at room temperature.
  • They discovered that even when this material has different magnetic regions called domains, the movement of magnons doesn't change much at all.
  • This finding surprised them because earlier models suggested that the magnons would change direction when they passed through the boundaries between these domains.

Article Abstract

We present room-temperature measurements of magnon spin diffusion in epitaxial ferrimagnetic insulator MgAlFeO (MAFO) thin films near zero applied magnetic field where the sample forms a multi-domain state. Due to a weak uniaxial magnetic anisotropy, the domains are separated primarily by 180° domain walls. We find, surprisingly, that the presence of the domain walls has very little effect on the spin diffusion - nonlocal spin transport signals in the multi-domain state retain at least 95% of the maximum signal strength measured for the spatially-uniform magnetic state, over distances at least five times the typical domain size. This result is in conflict with simple models of interactions between magnons and static domain walls, which predict that the spin polarization carried by the magnons reverses upon passage through a 180° domain wall.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10133301PMC
http://dx.doi.org/10.1038/s41467-023-38095-3DOI Listing

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