Hall Effect Measurement System
DX-1000L Low Temperature Hall Effect Test System
Low temperature Hall effect test system for characterising carrier transport properties of semiconductor materials under controlled magnetic field and temperature down to cryogenic levels.
The DX-1000L low temperature Hall effect test system integrates a precision electromagnet, bipolar constant current power supply, high‑resolution voltage acquisition and a cryogenic vacuum vessel. In combination with a dedicated Hall sample fixture and temperature controller, it enables accurate determination of carrier concentration, mobility, resistivity and Hall coefficient at temperatures from liquid‑nitrogen region down to 4 K, depending on configuration.
Automated software coordinates the electromagnet supply, gauss meter, thermostat and constant current source to perform fully automated Hall measurements. Bulk and sheet carrier concentration, mobility, resistivity, Hall coefficient and magnetoresistance can be evaluated as a function of both temperature and magnetic field, supporting advanced research on low‑temperature transport phenomena.
Key Features
- Precision electromagnet with high field capability and controlled uniformity region.
- Bipolar constant current power supply enabling smooth current reversal and four‑quadrant operation for inductive loads.
- Integrated constant current source, matrix switching and microvoltmeter for Hall and resistivity tests.
- Cryostat and temperature controller supporting low temperature operation with fine temperature resolution.
- Automated calculation of bulk and sheet carrier concentration, mobility, resistivity and Hall coefficient.
- I–V and I–R curve measurement and temperature‑dependent scans of key transport parameters.
- Support for a range of semiconductor and functional materials.
- Measurement results exportable to common data formats for detailed analysis.
Technical Specifications
| Specification | Value |
|---|---|
| Measurement Parameters | |
| Carrier concentration | ≈ 5 × 10¹² – 5 × 10²⁰ cm⁻³ (typical) |
| Mobility | 0.1 – 10⁸ cm²/V·s |
| Resistivity range | ≈ 5 × 10⁻⁵ – 5 × 10² Ω·cm |
| Resistance range | 10 mΩ – 6 MΩ |
| Hall coefficient range | ±1 × 10⁻² – ±1 × 10⁶ cm³/C (application dependent) |
| Magnetic System | |
| Magnet type | High precision electromagnet |
| Maximum magnetic field | ≈ 2 T @ 10 mm, 1.3 T @ 20 mm, 1.0 T @ 30 mm (typical) |
| Field uniformity | ~1% over 10 mm diameter at 60 mm spacing |
| Electrical System | |
| Sample current range | Approx. 0.05 µA – 50 mA, 0.1 nA adjustment |
| Measuring voltage range | 0.1 µV – 30 V |
| Temperature Environment | |
| Temperature adjustment | Resolution ≈ 0.1 K |
| Temperature range | Approx. 78 K – 325 K or 4 K – 325 K (configuration dependent) |
Applications
- Low temperature transport studies of semiconductor and functional materials.
- Evaluation of Hall coefficient, carrier concentration and mobility as a function of temperature and magnetic field.
- Investigations of quantum transport and low‑temperature conduction mechanisms.
- Advanced teaching and research experiments on electrical transport in cryogenic environments.
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