Journal
SCIENCE
Volume 339, Issue 6115, Pages 55-59Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1228519
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Funding
- European Research Council (ERC) Advanced Grant FURORE
- Bundesministerium fur Bildung und Forschung
- Deutsche Forschungsgemeinschaft [SFB668, SPP 1285, FOR1346, Graduiertenkolleg 1286]
- Cluster of Excellence Nanospintronics
- Forschungs-und Wissenschaftsstiftung Hamburg
- HGF-YIG Programme [VH-NG-717 (]
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The future of nanoscale spin-based technologies hinges on a fundamental understanding and dynamic control of atomic-scale magnets. The role of the substrate conduction electrons on the dynamics of supported atomic magnets is still a question of interest lacking experimental insight. We characterized the temperature-dependent dynamical response of artificially constructed magnets, composed of a few exchange-coupled atomic spins adsorbed on a metallic substrate, to spin-polarized currents driven and read out by a magnetic scanning tunneling microscope tip. The dynamics, reflected by two-state spin noise, is quantified by a model that considers the interplay between quantum tunneling and sequential spin transitions driven by electron spin-flip processes and accounts for an observed spin-transfer torque effect.
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