Physical Characterization
A basic screening of new compounds and materials created in our group is the task of the Physical Characterization. The researchers can use a large pool of magnet cryostats which allows them to do measurements on all kind of samples and even on highly air-sensitive material. The equipment is used for characterization as well for in-depth investigations on the physical properties.
Magnetization / magnetic susceptibility
Figure 1: Isothermal magnetization curves at various temperatures for a single crystal sample of a halfmetallic ferromagnet
© MPI-CPfS
- Two SQUID magnetometers
- temperatures 1.8 K - 400 K and 300 K - 800 K
- magnetic field 0.1 mT - 7.0 T
- 2 axis sample rotator
- various pressure cells
Magneto-electrical and thermal transport properties
Figure 2: Electrical resistivity in various magnetic fields for two superconducting compounds with filled skutterudite structure
© MPI CPfS
- temperatures 0.05 K - 400 K, magnetic field up to +-18 Tesla
- transversal and longitudinal magnetoresistance
- Hall effect, thermopower (Seebeck effect), Nernst effect
- horizontal sample rotator
- thermal conductivity 1.8 K-360 K, magnetic fields to +-9 T
- thermal diffusivity by Laser Flash method, 190 K - 1270 K
Electrical resistivity of air sensitive materials
Figure 3: Cryostat inside an Argon-filled glove box for resistivity measurements on highly air- and moisture-sensitive samples
© MPI-CPfS
- dc resistivity of bulk and powder samples, 4 K - 320 K
Specific heat capacity
Figure 4: Specific heat capacity of a series of isostructural compounds with filled skutterudite structure
© MPI-CPfS
- relaxation method 0.05 K - 400 K, magnetic field to +-9 T
- high-accuracy measurements possible