Spin-Orbit Torque in Bilayers of Kagome Ferromagnet Fe<sub>3</sub>Sn<sub>2</sub> and Pt.
basic_science · Level V
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- Record sourced from PubMed, PMID 34380320.
- Also identified by DOI 10.1021/acs.nanolett.1c02270.
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Abstract
Spin-orbit torque phenomena enable efficient manipulation of the magnetization in ferromagnet/heavy metal bilayer systems for prospective magnetic memory and logic applications. Kagome magnets are of particular interest for spin-orbit torque due to the interplay of magnetic order and the nontrivial band topology (e.g., flat bands and Dirac and Weyl points). Here we demonstrate spin-orbit torque and quantify its efficiency in a bilayer system of topological kagome ferromagnet Fe<sub>3</sub>Sn<sub>2</sub> and platinum. We use two different techniques, one based on the quasistatic magneto-optic Kerr effect (MOKE) and another based on time-resolved MOKE, to quantify spin-orbit torque. Both techniques give a consistent value of the effective spin Hall angle of the Fe<sub>3</sub>Sn<sub>2</sub>/Pt system. Our work may lead to further advances in spintronics based on topological kagome magnets.