Shaw, J.M.; Knut, R.; Armstrong, A.; Bhandary, S.; Kvashnin, Y.; Thonig, D.; Delczeg-Czirjak, E.K.; Karis, O.; Silva, T.J.; Weschke, E.; Nembach, H.T.; Eriksson, O.; Arena, D.A.: Quantifying Spin-Mixed States in Ferromagnets. Physical Review Letters 127 (2021), p. 207201/1-6
10.1103/physrevlett.127.207201
Open Access Version
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.