DynaCool Physical Property Measurement System (PPMS)

Location 2171 HH Dow

Tim Chambers, Sahar Farjami



Quantum Design’s PPMS provides experimentalists the ability to measure electrical, magnetic, thermal and optical properties of materials. The Cryogen Free DynaCool PPMS system can control the sample temperature from 1.8 K to 400 K with a maximum applied magnetic field of 9 Tesla.


Superconducting magnet: 9 Tesla Cryogen Free

Magnet is cooled by solid conduction through 4 K plate 

Temperature range: 1.8 K - 400 K


1)     Electrical Resistivity Option (ERO) 


  • DC resistance bridge 
  • Minimum measurable resistance: 10 μΩ
  • Maximum measurable resistance: 1 MΩ
  • Maximum excitation current: 5 mA


2)     Electrical Transport Option (ETO) 


  • For performing AC Resistance, Hall Effect, I-V, and Differential Resistance (dV/dI vs. I) measurements.
  • 1 nV sensitivity, 10 nΩ resolution at 100 mA
  • AC and DC drive amplitude 10 nA to 100 mA
  • Resistance ranges from 10 µΩ to 5 GΩ


3)     Vibrating Sample Magnetometry (VSM) 


Vibrating Sample Magnetometry is a fast and sensitive technique to determine a sample's magnetic dipole moment. The moment arises from the material's magnetization density which is a fundamental thermodynamic quantity. This tool can be used to study phenomena such as superconductivity, ferromagnetism, superparamagnetism and magnetic frustration.


4)     Thermal Transport Option (TTO)   


  • AC Resistivity ρ

Measured by using precision DSP current source and phase-sensitive voltage detection.


  • Thermal Conductivity κ

Measured by applying heat from the heater shoe in order to create a user-specified temperature differential between the two thermometer shoes.


  • Seebeck Coefficient α

Measured by creating a specified temperature drop between the two thermometer shoes - just as it does to measure thermal conductivity. However, for Seebeck coefficient the voltage drop created between the thermometer shoes is also monitored.


  • Thermoelectric Figure of Merit ZT

Determined here simply as the algebraic combination α2T /(κρ) of the three measured quantities - thermal conductivity, Seebeck coefficient, and AC electrical resistivity.


5)     Optical Multifunction Probe (OMFP) 

The OMFP allows optical access to the sample space of the variable temperature and magnetic field environment of the PPMS. The OMFP enables the construction of experiments which leverage radiation in the UV-VIS-IR spectrum- either as a form of excitation or means of analysis.