QuantumFrontiers Current News
Hochleistungs-PPMS verstärkt Quantenforschung an der TU Braunschweig

High-performance PPMS boosts quantum research at TU Braunschweig

© Laurenz Kötter/TU Braunschweig
Dr Anton Pokusinskyi at the new system of the CryoQuant Research Group.

Literally cool news from the Department of Cryogenic Quantum Electronics (CryoQuant) at the Institute of Electrical Measurement Science and Fundamental Electrical Engineering (EMG) at TU Braunschweig. With the cryogenically compatible ‘DynaCool’ measurement system (Physical Property Measurement System / PPMS), Professor Oleksandr Dobrovolskiy’s research group can now analyse quantum and functional materials with greater precision and advance interdisciplinary collaborations such as those within the QuantumFrontiers Cluster of Excellence.

The fully automated system combines a wide range of advanced measurement methods in a single instrument and covers an exceptionally broad range of applications. It enables experiments under extreme conditions – at temperatures ranging from a mere 1.8 Kelvin, close to absolute zero, up to 400 Kelvin, and under strong magnetic fields of up to 9 Tesla. In addition to conventional electrical transport and Hall measurements, the system supports broadband ferromagnetic resonance (FMR) spectroscopy up to 40 gigahertz. A precision rotator also allows samples to be examined as a function of angle, whilst optical access via fibre-optic and free-space interfaces enables flexible experiments. This means that the Braunschweig-based research team can now examine superconducting, magnetic, spintronic, semiconductor and optoelectronic materials and components in detail under various operating conditions.

Above all, the new research infrastructure strengthens interdisciplinary collaboration, for example with the Institute of Semiconductor Technology and the Institute of Condensed Matter Physics at TU Braunschweig. The instrument is already being used in several collaborative projects. As part of the ‘OptoFluxonics’ project within the QuantumFrontiers Cluster of Excellence, it enables comprehensive analyses of hybrid, light-controlled superconducting devices. In the DFG project ‘Super3DMag’, it is being used to characterise advanced magnetic materials and complex 3D nanoarchitectures. Furthermore, the DFG project ‘SyMPaThY’ is utilising the new technology for spectroscopic investigations of spin waves at low temperatures.

The system was acquired as part of the DFG’s Major Equipment Programme (Article 91b of the German Basic Law) under FUGG number INST 188/584 (project no. 558960473).