Long lived excitations in fully compensated antiferromagnetic nanomagnets

ORAL

Abstract

Extensive interest is directed towards finding long lived states in atomic scale magnetic structures. Applications include classical and quantum spintronics schemes. Here we use a recently described method of applying a single atom exchange bias, using a magnetic scanning tunneling microscope tip [1], to control the quantum states of fully compensated nano-antiferromagnetic atomic chains. We apply time-resolved spin-polarized scanning tunneling microscopy to measure the energy relaxation of the chains as a function of the tip interaction strength. With strong coupling to the microscope tip, the excited state lifetimes can extend to the millisecond scale. [1] Nature Nanotech. 10, 40 (2015).

*Center for Free Electron Laser Science, Max Planck Society, Deutsches Elektronen-Synchrotron, Alexander von Humboldt Foundation, Natural Sciences and Engineering Research Council of Canada

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Authors

  • Jacob Burgess

    • University of Manitoba, Max Planck Institute for the Structure and Dynamics of Matter, and Max Planck Institute for Solid State Research

  • Luigi Malavolti

    • Max Planck Institute for the Structure and Dynamics of Matter and Max Planck Institute for Solid State Research

  • Steffen Rolf-Pissarczyk

    • Max Planck Institute for the Structure and Dynamics of Matter and Max Planck Institute for Solid State Research

  • Gregory McMurtrie

    • Max Planck Institute for the Structure and Dynamics of Matter and Max Planck Institute for Solid State Research

  • Shichao Yan

    • Max Planck Institute for the Structure and Dynamics of Matter and Max Planck Institute for Solid State Research

  • Sebastian Loth

    • Max Planck Institute for the Structure and Dynamics of Matter and Max Planck Institute for Solid State Research