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Material Science & Nanotechnology
Hall Effect
HCS 1/ 10/ 100 – Hall Effect Measurement System
Measurement system
Permanent Magnet Option (HCS 1)
The HCS 1 stage is equipped with two magnetic circuits (Neodymium), assembled on a moveable sledge, which optionally can be automized. The system can be equipped with a low temperature as well as high temperature extension.
Electromagnet Option (HCS 10)
Optional to the permanent magnet, an electromagnet kit is available. The water cooled electromagnet is working in combination with a programmable power supply and a current reversal switch. The power supply can apply currents of up to 75 A, resulting in a variable magnetic fi eld strength of up to +/-1 T.
Halbach option (HCS 100)
The HCS 100 uses a magent in Halbach configuration (permanent magnet in donut configuration), in order to apply either a DC or an AC magnetic field to the sample. In combination with an AC current, provided by a Lock-in amplifier, this setup is a powerful tool for the investigation of challenging samples, as occuring offsets as well as noise can be suppressed in most cases.
Specifications
| MODEL | HCS 1 |
|---|---|
| Temperature range: | From LN2 up to 600°C in different configurations |
| Magnet: | Permanent magnets up to 0.70 T DC field Pole diameter 120 mm Two magnet setup for bipolar measurement. |
| Current source: | DC 1nA up to 125mA (8 decades / Compliance +/- 12V) AC 16 μA up to 20 mA and output impedance: >100 GigaOhm from 1 mHz to 100 kHz |
| Voltage measurement: | DC low noise / low drift 1μV up to 2500mV, 4 decades amplification, Digital resolution: 300pV AC 20 nV up to 1V, Features: GΩ range input impedance, variable integration times and amplification |
| Sensors/ Sample geometry: | – from 5 x 5 mm to 12.5 x 12.5 mm, Maximum sample height 3 mm – from 17.5 x 17.5 mm up to 25 x25 mm, Maximum sample height 5 mm – from 42.5 x 42.5 mm up to 50 x 50 mm, Maximum sample height 5 mm – High Temperature board, 10x10mm, max. sample height 2mm |
| Resistivity Range: | 10-4 up to 107(Ωcm) |
| Carrier concentration: | 107 up to 1021cm−3 |
| Mobility range: | 10-2 up to 107(cm2/Volt sec) |
| Atmospheres: | Vaccum, inert, oxidizing, reducing |
| Temperature precision: | 0.05°C |
| MODEL | HCS 10 |
|---|---|
| Temperature range: | From LN2 up to 600°C in different configurations |
| Magnet: | Electromagnet up to +/-1 T variable DC field, Pole diameter 76 mm, Power supply 75A / 40V. Current reversal swith for bipolar measurement. Alternative AC option for alternating magnetic field ~1T delta @ up to 0.1 Hz. |
| Current source: | DC 1nA up to 125mA (8 decades / Compliance +/- 12V) AC 16 μA up to 20 mA and output impedance: >100 GigaOhm from 1 mHz to 100 kHz |
| Voltage measurement: | DC low noise / low drift 1μV up to 2500mV, 4 decades amplification, Digital resolution: 300pV AC 20 nV up to 1V, Features: GΩ range input impedance, variable integration times and amplification |
| Sensors/ Sample geometry: | – from 5 x 5 mm to 12.5 x 12.5 mm, Maximum sample height 3 mm – from 17.5 x 17.5 mm up to 25 x25 mm, Maximum sample height 5 mm – from 42.5 x 42.5 mm up to 50 x 50 mm, Maximum sample height 5 mm – High Temperature board, 10x10mm, max. sample height 2mm |
| Resistivity Range: | 10-4 up to 107(Ωcm) |
| Carrier concentration: | 107 up to 1021cm−3 |
| Mobility range: | 10-2 up to 107(cm2/Volt sec) |
| Atmospheres: | Vaccum, inert, oxidizing, reducing |
| Temperature precision: | 0.05°C |
| MODEL | HCS 100 |
|---|---|
| Temperature range: | RT up to 500°C |
| Magnet: | Magnet up to 0.5 T (AC or DC field) Multisegment Halbach configuration, Inner diameter: 40mm, Height: 98mm |
| Current output: | DC 1nA up to 125mA (8 decades / Compliance +/- 12V) AC 16 μA up to 20 mA and output impedance: >100 GigaOhm from 1 mHz to 100 kHz |
| Voltage measurement: | DC low noise / low drift 1μV up to 2500mV, 4 decades amplification, Digital resolution: 300pV AC 20 nV up to 1V, Features: GΩ range input impedance, variable integration times and amplification |
| Sensors/ Sample geometry: | up to 10 x 10mm, Maximum sample height 2.5 mm |
| Resistivity Range: | 10-5 up to 107(Ωcm) |
| Carrier concentration: | 107 up to 1022cm−3 |
| Mobility range: | 10-3 up to 107(cm2/Volt sec) |
| Atmospheres: | Vaccum, inert, oxidizing, reducing |
| Temperature precision: | 0.05°C |
HCS 100: halbach magnet (donut configuration)
HCS 1: Exchangeable Sensors with an EPROM on it for easy plug and play usage.
Seebeck-Option
| MODEL | HCS 1 | HCS 10 |
|---|---|---|
| Sample Geometry: | length 6 mm to 15 mm, width 1 mm to 10 mm, height thin film to 2 mm |
length 6 mm to 15 mm, width 1 mm to 10 mm, height thin film to 2 mm |
| Seebeck Coefficient: | from 1 μV/K up to 2500 μV/K | from 1 μV/K up to 2500 μV/K |
| Measurement: | Slope technique with 10 Readings/Sec | Slope technique with 10 Readings/Sec |
| Gradient heater: | from 0.1 K up to 20 K | from 0.1 K up to 20 K |
| Thermocouples: | Type K | Type K |
HCS Seebeck Sensor
Accessories
- Different sample holders are available to take measurements from LN2 up to 800°C.
- The sample holder handle closes the measurement chamber vacuum tight.
- The measurement chamber is provided with a gas in and outlet, so measurements can be taken under controlled and changeable atmospheres.
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