Hall Effect Measurement System
DX-1000H High Temperature Hall Measurement Setup
High temperature Hall measurement setup for characterising carrier transport properties of semiconductor materials under controlled magnetic field and temperature up to elevated temperatures.
The DX-1000H high temperature Hall measurement setup integrates a precision electromagnet, bipolar constant current power supply, high-resolution voltage acquisition and a high-temperature vacuum chamber. Together with a dedicated Hall sample fixture, the system enables measurement of carrier concentration, Hall mobility, resistivity and Hall coefficient over a broad temperature range.
Automated control software coordinates the electromagnet supply, gauss meter, temperature controller and current source to perform fully automated Hall measurements. Bulk and sheet carrier concentration, mobility, resistivity, Hall coefficient and magnetoresistance can be evaluated as functions of temperature and magnetic field, providing a comprehensive picture of high-temperature transport behaviour.
Key Features
- High precision electromagnet with up to ~2 T field at 10 mm pole spacing and defined uniform region.
- Bipolar constant current power supply with smooth zero crossing and four-quadrant operation for inductive magnet loads.
- Integrated constant current source, matrix switching and microvoltmeter for Hall and resistivity measurements.
- High temperature vacuum chamber and thermostat for measurements up to typically 773 K.
- Software-controlled acquisition of Hall coefficient, carrier concentration, mobility, resistivity and magnetoresistance.
- I–V and I–R curve measurement capability with temperature and field sweeps.
- Support for continuous temperature scans with defined temperature steps.
- Measurement results exportable to Excel for post-processing and reporting.
Technical Specifications
| Specification | Value |
|---|---|
| Measurement Parameters | |
| Carrier concentration | ~10⁸ cm⁻³ – 10²³ cm⁻³ (typical) |
| Mobility | 1 – 10⁶ cm²/V·s |
| Resistivity range | ≈ 5 × 10⁻⁴ – 10⁸ Ω·cm |
| Resistance range | 10 mΩ – 100 GΩ |
| Hall coefficient range | ±1 × 10⁻⁵ – ±1 × 10¹⁰ cm³/C (application dependent) |
| Magnetic System | |
| Magnet type | High precision electromagnet |
| Pole diameter | 100 mm |
| Maximum magnetic field | ≈ 2 T @ 10 mm, 1.3 T @ 20 mm, 1.0 T @ 30 mm |
| Field uniformity | ~1% over 10 mm diameter at 60 mm spacing |
| Magnet weight | Approx. 110 kg (including bracket and wheels) |
| Bipolar Constant Current Power Supply | |
| Output current / voltage | ±10 A, ±80 V (approx. 800 W) |
| Operation | Smooth zero crossing, four-quadrant operation for inductive loads |
| Current stability | Better than ±25 ppm/h (standard), ±5 ppm/h (high stability) |
| Constant Current Source & Measurement | |
| Sample current range | Approx. 0.05 µA – 50 mA, 0.1 nA adjustment |
| Measuring voltage range | 0.1 µV – 30 V |
| High Temperature Thermostat | |
| Temperature range | Approx. 4 K – 773 K (configuration dependent) with ≈0.1 K control resolution |
Applications
- High temperature transport studies of semiconductor and functional materials.
- Evaluation of Hall coefficient, carrier concentration and mobility as a function of temperature and magnetic field.
- Device and material reliability investigations under elevated temperature conditions.
- Research and advanced teaching experiments on electrical transport phenomena.
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