Interplay of Magnetization Dynamics with a 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

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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

Original languageEnglish
Article number044076
JournalPhysical review applied
Issue number4
Publication statusPublished - 23 Apr 2019


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