A radio-frequency coil for the microwave characterization of vortex dynamics in thin film superconductors

作者：Cuadra Solis Pedro de Jesus^*; Fernandez Martinez Antoni; Manel Hernandez Joan; Garcia Santiago Antoni; Vanacken Johan; Moshchalkov Victor V

来源：Review of Scientific Instruments, 2015, 86(6): 064701.

DOI：10.1063/1.4921710

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.

• 出版日期2015-6