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Quantifying Spin-Mixed States in Ferromagnets

Justin M. Shaw, Ronny Knut, Abigail Armstrong, Sumanta Bhandary, Yaroslav Kvashnin, Danny Thonig, Erna K. Delczeg-Czirjak, Olof Karis, T. J. Silva, Eugen Weschke, Hans T. Nembach, Olle Eriksson, and Dario A. Arena
Phys. Rev. Lett. 127, 207201 – Published 8 November 2021
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Abstract

We quantify the presence of spin-mixed states in ferromagnetic 3D transition metals by precise measurement of the orbital moment. While central to phenomena such as Elliot-Yafet scattering, quantification of the spin-mixing parameter has hitherto been confined to theoretical calculations. We demonstrate that this information is also available by experimental means. Comparison of ferromagnetic resonance spectroscopy with x-ray magnetic circular dichroism results show that Kittel’s original derivation of the spectroscopic g factor requires modification, to include spin mixing of valence band states. Our results are supported by ab initio relativistic electronic structure theory.

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  • Received 19 May 2021
  • Accepted 8 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.207201

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAccelerators & Beams

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Spin Mixing in Ferromagnets Revealed

Published 8 November 2021

Experiments with thin magnetic films show that mixing between spin states has a larger than expected effect on spectroscopic measurements used to probe magnetic interactions in materials.

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Authors & Affiliations

Justin M. Shaw1, Ronny Knut2, Abigail Armstrong3, Sumanta Bhandary4, Yaroslav Kvashnin2, Danny Thonig5, Erna K. Delczeg-Czirjak2, Olof Karis2, T. J. Silva1, Eugen Weschke6, Hans T. Nembach1,7, Olle Eriksson2,5, and Dario A. Arena3

  • 1Quantum Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
  • 2Department of Physics and Astronomy, University Uppsala, S-75120 Uppsala, Sweden
  • 3Department of Physics, University of South Florida, Tampa, Florida 33620, USA
  • 4School of Physics and CRANN Institute, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
  • 5School of Science and Technology, Örebro University, SE-701 82 Örebro, Sweden
  • 6Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, D-12489 Berlin, Germany
  • 7Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

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Issue

Vol. 127, Iss. 20 — 12 November 2021

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