title: A radio-frequency coil for the microwave characterization of vortex dynamics in thin film superconductors.
abstract: A radio-frequency coil for the experimental investigation of the magnetic properties of thin superconducting films under microwave fields at different values of temperature and dc magnetic field has been developed. The system has been used for low-temperature microwave frequency-dependent magnetization measurements in a Pb thin film with an engineered periodical antidot array. The characteristic frequencies and the electric and magnetic fields of the resonant system formed by a multi-turn coil with a sample loaded in its core are estimated using the helical approach. A good agreement of the calculated values with those recorded in swept-frequency spectra is obtained. The relation between the characteristics of the resonant structure and the frequency-driven magnetic response of the sample at different nominal microwave powers documents the capability and sensitivity of the layout.
authors.affiliation: Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain and Institut de Nanociència i Nanotecnologia INUB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, 08028 Barcelona, Spain.
authors.forename: Pedro-de-Jesús
authors.initials: PD
authors.lastname: Cuadra-Solís
authors.affiliation: Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain and Institut de Nanociència i Nanotecnologia INUB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, 08028 Barcelona, Spain.
authors.forename: Antoni
authors.initials: A
authors.lastname: Fernández-Martínez
authors.affiliation: Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain and Institut de Nanociència i Nanotecnologia INUB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, 08028 Barcelona, Spain.
authors.forename: Joan Manel
authors.initials: JM
authors.lastname: Hernàndez
authors.affiliation: Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain and Institut de Nanociència i Nanotecnologia INUB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, 08028 Barcelona, Spain.
authors.forename: Antoni
authors.initials: A
authors.lastname: García-Santiago
authors.affiliation: Institute for Nanoscale Physics and Chemistry (INPAC), Nanoscale Superconductivity and Magnetism Pulsed Fields Group, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
authors.forename: Johan
authors.initials: J
authors.lastname: Vanacken
authors.affiliation: Institute for Nanoscale Physics and Chemistry (INPAC), Nanoscale Superconductivity and Magnetism Pulsed Fields Group, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
authors.forename: Victor V
authors.initials: VV
authors.lastname: Moshchalkov