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Experimental techniques and facilities

Published on 13 December 2018

Measurements in a wide temperature (0.005 K - 300 K) and magnetic field range (0 - 18 T) and pressure range (0 - 20 GPa) can be performed in the laboratory:

Set up for thermal conductivity and thermal transport measurements on a rotating sample holder.

• several dilution refrigerators for standard measurements cryomagnets up to 18 T can be used with different cryostats

• 15 T magnet for measurements down to 0.005 K

3He cryostat, 4He cryostats

• very low temperature thermal transport measurements (T > 0.005 K) thermoelectric power

• measurements specific heat to very low temperatures

• possibility of continuous sample rotation in dilution

• quantum oscillations measurements

• fast sample characterisation can be performed in an PPMS from Quantum design with 9 T magnet and 3He option

High pressure experiments

Sample with four contacts for resistivity measurements in diamond anvil cell.

• piston cylinder pressure cells for transport, susceptibility, thermal expansion, and neutron scattering experiments
(0 - 3 GPa, 25 mK - 300 K, 0 - 18T)

• diamond anvil cells for transport, susceptibility, and specific heat experiments
(0 - 20 GPa, 25 mK - 300 K, 0- 18 T)

• For diamond anvil cells we have the possibility to change the pressure continuously at low temperature what allows to determine very precisely the high pressure phase diagram.

Single crystal growth:

PrOs4Sb12 single crystal grown out of Sb flux (top left), single crystal growth of UCoGe in the tetra arc furnace (top right)) and Sr12Ca2Cu24O41 crystal grown by the Traveling Solvent Float Zone (TSFZ) technique in a mirror furnace (bottom).

The focus of single crystal growth is to obtain very pure, high quality crystals. Depending on the material, different techniques can be used
• tetra arc furnace
• mirror furnace
• flux method
• bridgman technique
• Czochralski method

Further reading:

Aoki D, Lapertot G, Marin C and Mony K
Crystal growth.