Facilities of the Correlated Electrons Systems Group

The Correlated Electron Systems Group has extensive equipment dedicated to the study of the novel physics of metals and superconductors at low temperature and high magnetic field. This page contains some details of the experimental equipment we have in our group.
 

High Magnetic Field / Low Temperature Facilities (1) 19T magnet with dilution fridge and demagnetisation stage

Maximum field 19T, minimum temperature 0.5mK, very low vibration, equipped with several very low noise DC SQUIDs. Uses : dHvA measurement, heat capacity and thermal conductivity.

(2) TLM dilution fridge with 13.6T magnet

Maximum field 13.6T, base temperature 18mK, sample loads directly into mixing chamber, rapid changeover time for samples. Main uses : dHvA measurements, resistivity and AC susceptibility.

(3) 20.5T magnet with He-3 fridge

Maximum field 20.5T (our highest steady field), minimum temperature 250mK, rapid sample changeover (loads into He-3). Main uses : dHvA measurements, resistivity and AC susceptibility.

(4) Low Field Top Loading Dilution Fridge

Kelvinox-100 dilution fridge, minimum temperature 12mK, zero field (Earth's field shielded with mu-metal 1#956;T. Main use : measurements of the magnetic penetration depth in superconductors (using a radio frequency technique).

(5) 15T magnet with 1.2K pumped helium cryostat

Used for specific heat measurements on very small samples (AC and relaxation techniques) and also for general purpose transport measurements.

(6) Pulsed Magnet System (1) - Helium 4 flow cryostat

Maximum field 52T (pulsed field, rise time 4ms, fall time 10ms), minimum temperature 1.2K

(7) Pulsed Magnet System (2) - Plastic dilution fridge

As (6), but with a dilution fridge insert, maximum field 52T (pulsed field, ramp up/down is 1ms), minimum temperature 40mK

(8) Pumped Helium-4 cryostat for RF magnetic penetration depth measurements

Minimum temperature 1.2K, low ambient field (mu-metal shielding)

(9) Quantum Design 7T SQUID magnetometer

Minimum temperature 1.2K, maximum field 7T

(10) Heliox Helium 3 cryopumped system

Minimum temperature 250mK. Main uses : heat capacity, resistivity and AC susceptibility

(11) 14T magnet with 1.2K variable temperature insert

Used primarily for transport and Hall Effect measurements

Helium Liquefier The group as its own helium liquefier

X-ray Laue Camera The Laue camera is used for orienting single crystals

Furnaces (single crystal growth) Light Furnace (Crystal Systems)

Maximum temperature 2200 degrees C

Annealing furnaces

Several up to 1200 degrees C, two up to 1700 degrees C, one UHV

Positron Group Facilities Angular correlation spectrometer for Fermi surface studies

Positron Lifetime spectrometer (mainly used for studies of polymers)

External Facilities The Correlated Electron Systems Group makes extensive use of external facilities. These include neutron facilities, such as the ILL in Grenoble (France) and ISIS in the UK, where we are closely involved in the development of new instrumentation and software, synchrotron facilities (such as the ESRF (France) and SPring-8 in Japan), and high-magnetic-fields facilities such as the National High Magnetic Field Laboratory in Tallahassee, Florida, as well as the high field magnet laboratory in Grenoble.