Brief description of equipment
The setup is operated in the Nano-Fluxonics lab
It allows for
● combined microwave transmission and dc voltage measurements,
● vector network analyzer-based ferromagnetic resonance (VNA-FMR),
● fluctuation spectroscopy.
The setup is based on a 4He cryostat equipped with a home-made high-frequency cryogenic sample probe.
The instrumentation allows for measuring the transmitted/absorbed microwave power and the dc and ac voltages at temperatures from 2 to 300 K and magnetic fields up to 12 T.
In the frequency range 0.3 MHz – 20 GHz the ac stimuli is sourced from an Agilent E5071C vector network analyzer, while at lower frequencies a lock-in amplifier can be used.
Samples are thin films (on substrates up to 10×10 mm2) patterned in a suitable 50 Ω impedance-matched geometry, e.g. microstrips, coplanar waveguides, resonators etc. In addition, a low-frequency spectrum analyzer can be used for fluctuation (noise) spectroscopy measurements.
Frankfurt am Main
Related publications Mobile ﬂuxons as coherent probes of periodic pinning in superconductors,
O. V. Dobrovolskiy, M. Huth, V. A. Shklovskij, and R. V. Vovk
Sci. Rep. 7, 13740 (2017)  lternating current-driven microwave loss modulation in a ﬂuxonic metamaterial
O. V. Dobrovolskiy, M. Huth, and V. A. Shklovskij
Appl. Phys. Lett. 107, 162603 (2015)  Dual cut-off direct current-tunable microwave low-pass ﬁlter on superconducting Nb microstrips with asymmetric nanogrooves
O. V. Dobrovolskiy and M. Huth
Appl. Phys. Lett. 106, 142601 (2015)