A number of contemporary electronic and semiconductor materials are being developed for applications that include thermoelectric and photovoltaic
materials, organic electronics, new display technologies and high power devices. It is very tough to measure the electronic properties of these materials.
Presently available DC field electronic transport property measurement systems cannot measure many of these materials because of their low charge carrier
mobilities and the high temperatures required for characterization of high power devices. It becomes essential to discover a new measurement method.
This evolving materials class has mobilities below 1 cm2/V s. It is challenging to extract the extremely small hall voltage from the background
noise produced. Toyo and Lakeshore have partnered to develop the model 8404 Hall effect measurement system (HMS), with an AC field Hall measurement option that can measure mobilities down to 0.001 cm2/Vs. This is a remarkable
breakthrough in research productivity enabling these materials to be measured easily.
The key features of the Model 8404 are:
- The model 8404 offers a wide range of Hall measurements on van der Pauw samples
- The standard system can perform DC field measurements and has a resistance range from 0.5 mW to 10 MW
- The options available are AC field capability, variable temperature assemblies, high and low resistance, and optical access
- These options ensure that measurement opportunities are broadened and experimental processes are simplified
- The Model 8404 HMS offers a robust platform to which new features can be added as material measurement needs evolve
Fields of Study and Research
The Model 8404 HMS integrates the best of both DC and AC field Hall measurement
methodologies to enable a wide range of research applications. The HMS utility is extended by the optional variable temperature modules and measurement
platforms available helping the system to be configured to meet specific needs.