Physik
Fachbereich 13

The group is equipped with state-of-the art facilities for characterization and investigation of magnetic, metallic and superconducting materials. A number of highly advanced experimental techniques is available which can be combined with ultra-low temperatures, high hydrostatic pressure and high magnetic fields.

The following experimental techniques are available:

Sample characterization/preparation

• Electrocrystallization facilities for preparing single crystalline organic charge-transfer salts
• SQUID-magnetometer (Quantum Design 2- 350 K, B up to 5 T)
• Transport cryostat (Cryogenic, 1.5 – 300 K, B up to 12 T)
• High-field ESR spectrometer; cavity for variable frequencies

Low-temperature systems for advanced experiments

• Transport measurements under hydrostatic gas pressure (1.5 – 300 K, up to 13 kbar and 12 T)
• Variable temperature insert for measurements of the elastic constants andultrasound attenuation (1.5 – 300 K, up to 14 T)
• High-resolution dilatometer operating at ambient pressure (1.4 K – 300 K, up to 11 T)
• High-resolution dilatometer for measurements of the thermal expansion and magnetostriction (0.05 K – 6 K, up to 18 T)
• High-resolution dilatometer operating at various gas pressures up to 3.5 kbar (1.4 – 300 K, up to 11 T)
• Microcalorimeter for samples in the sub-milligram range (1.8-40 K, up to 8 T)
• Toploading ³He-⁴He dilution refrigerator for magnetic and acoustic measurements (0.05 – 1 K, and hydrostatic pressure up to 6 kbar)
• Bottom-loading ³He-⁴He dilution refrigerator for transport and magnetic measurements (0.010 – 6 K, up to 17 T)
• Pulse-field facility for magnetic, acoustic and ESR measurements at B ≤ 58 T and T ≥1.2 K