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arXiv · 1902.07566

Interplay of magnetization dynamics with microwave waveguide at cryogenic temperatures

I. A. Golovchanskiy·N. N. Abramov·M. Pfirrmann·T. Piskor·J. N. Voss·D. S. Baranov·R. A. Hovhannisyan·V. S. Stolyarov·C. Dubs·A. A. Golubov·V. V. Ryazanov·A. V. Ustinov·M. Weides
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Abstract

In this work, magnetization dynamics is studied at low temperatures in a hybrid system that consists of thin epitaxial magnetic film coupled with superconducting planar microwave waveguide. The resonance spectrum was observed in a wide magnetic field range, including low fields below the saturation magnetization and both polarities. Analysis of the spectrum via a developed fitting routine allowed to derive all magnetic parameters of the film at cryogenic temperatures, to detect waveguide-induced uniaxial magnetic anisotropies of the first and the second order, and to uncover a minor misalignment of magnetic field. A substantial influence of the superconducting critical state on resonance spectrum is observed and discussed.

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I. A. Golovchanskiy, N. N. Abramov, M. Pfirrmann, T. Piskor, J. N. Voss, D. S. Baranov, R. A. Hovhannisyan, V. S. Stolyarov, C. Dubs, A. A. Golubov, V. V. Ryazanov, A. V. Ustinov, M. Weides. 2019-02-20. Interplay of magnetization dynamics with microwave waveguide at cryogenic temperatures. https://doi.org/10.1103/physrevapplied.11.044076

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