Instrument Overview:
The Quantum Design DynaCoolTM Physical Properties Measurement System (PPMS) is a multifunctional instrument, able to measure the electromagnetic and thermodynamic properties of virtually any material under magnetic fields of up to ± 14 T and temperatures of 400 K – 1.8 K (and up to 1000 K in the case of magnetisation measurements). Unique in the UK, the MRF’s PPMS can characterise samples that have been irradiated, with activities < 0.1 MBq Co60 equivalent. Modules currently installed are: Vibrating Sample Magnetometer (& VSM oven), AC Measurement System II, Electrical Transport Option, Resistivity Option, Heat Capacity Option, Thermal Transport Option, Horizontal Rotator Option.
Applications
- Vibrating Sample Magnetometer: DC magnetisation
- AC Measurement System II: AC magnetic susceptibility and DC magnetisation
- Electrical Transport Option: electrical resistance, hall-coefficient, current-voltage characteristics, and differential current-voltage characteristics
- Resistivity Option: electrical resistance
- Heat Capacity Option: specific heat capacity
- Thermal Transport Option: thermal conductance, Seebeck coefficient, resistivity, thermoelectric figure of merit
- Horizontal Rotator Option: sample rotation – compatible with the ETO and resistivity options
Quantum Design DynaCoolTM Physical Properties Measurement System (PPMS) with linear motor attached.
Technical Specification:
- Temperature Control:
- 1 hour to cool from room temperature to 1.8 K
- 0.1 % stability for T < 20 K , 0.02 % stability for T > 20 K
- Magnetic Field Control:
- Max field ramp rate: 0.01 T s-1
- 0.1 % field uniformity over central 5.5 cm sample space
- Vibrating Sample Magnetometer:
- Max Field ramp rate: 0.01 T s-1
- DC moment precision: 1 nA m2
- Accuracy: ± 0.5 %
- AC Measurement System II:
- AC moment precision: 10 pA m2
- DC moment precision: 5 nA m2
- Accuracy : ± 1%
- Electrical Transport Option:
- 2 measurement channels
- Dynamic range : 10 μΩ – 5 GΩ
- Precision: 10 nΩ
- Accuracy: ± 0.1% R < 200 kΩ
- ± 0.2% R ≈ 1 MΩ
- ± 2.0% R < 1 GΩ
- ± 5.0% R = 5 GΩ
- Resistivity Option:
- 3 measurement channels
- Dynamic range: 10 μΩ – 5 MΩ
- Precision: 4 μΩ
- Accuracy: ± 0.1% R < 200 kΩ
- ± 0.2% R ≈ 1 MΩ
- Heat Capacity Option:
- Precision: 10 nJ/K
- Accuracy: ± 5%
- Thermal Transport Option:
- Dynamic Range: 1 – 25 mW/K for T = 400 K
- 100 μW/K – 100 mW/K for T ≈ 50 K
- 10 μW/K – 1 mW/K for T ≈ 1.9 K
- Accuracy: ± 5 %