Model 8425 Specifications

Hall effect measurement capabilities

Mobility1 to 1 × 106 cm2/V s
Carrier concentration density8 × 102 to 8 × 1023 cm-3
Resistivity1 × 10-5 to 1 × 105 Ω·cm
Standard resistance range 
 ±0.5% rdg ±0.5% range VdP/Hall bar minimum: 0.5 mΩ
Maximum: 10 MΩ
 ±0.075% rdg ±0.05% range Maximum: 5 MΩ
Optional high resistance range 
 ±0.25% rdg VdP/Hall bar minimum: 10 kΩ
Maximum: 50 GΩ
 ±1.5% rdg Maximum: 100 GΩ
*Probe contact resistance may vary with sample

Sample environment

Cooling source2-stage closed cycle refrigerator (CCR) with 1 W cooling power at 4.2 K
Sample temperature10 K to 400 K
Sample sizesUp to 51 mm (2 in) with SH-2.00-I (installed isolated sample holder)

Vacuum

 Standard TPS-FRGPS-HV-CPX option
Pump down time90 min
(to reach <1 × 10-3 Torr)
30 min
(to reach <1 × 10-3 Torr)
Room temperature<5 × 10-4 Torr<5 × 10-6 Torr
Base temperature<1 × 10-5 Torr<5 × 10-7 Torr
Maximum temperature<1 × 10-5 Torr<5 × 10-7 Torr

Magnetic field

Magnet typeSuperconducting solenoid
Field orientationVertical (perpendicular to the sample plane)
Field capability±2 T for Hall measurement
Field homogeneity0.5% over 10 mm diameter; 1.0% over 25 mm diameter
Landed probe tip movement<5 µm full field ramp

Measurements

Station footprint800 mm (31.5 in) width × 670 mm (26.4 in) depth (does not include console or CCR compressor)
Console footprint766 mm (30.2 in) width × 754 mm (29.7 in) depth
CCR compressor footprint434 mm (17 in) width × 483 mm (19 in) depth

Utilities

1-phase voltage100/120/220/240 VAC (+5%, -10%), 50/60 Hz
1-phase power3.5 kVA recommended
3-phase voltage (CCR)200 VAC (50/60 Hz) or 380/400/415 VAC 50 Hz or 480 VAC 60 Hz
3-phase power (CCR)9 kVA recommended

Cooling water

Power dissipation (CCR)8.5 kW max; 6.9 kW steady state at 50 Hz; 9.0 kW max; 7.8 kW steady state at 60 Hz — see list of available recirculating chillers
  
ApprovalAll instruments CE marked

See more CRX-VF probe station specifications.

 

Model 8425 overview

More about the Model 8425

Model 8425 software

Options for the Model 8425

Recirculating chillers