The Van der Paw method is a method for measuring the specific resistivity and Hall effect of flat samples of arbitrary shape, in which contacts are sufficiently small and placed on the circumference of the sample.
If one is provided with just an SMU, one can achieve all the eight configurations ( V1 - V8 ) by switching the probes manually.
… | In this setup, we have used a system switch to internally switch the connections and achieve the eight configurations. The user just needs to execute the LabView code once, and it switches internally and generates all 8 configurations and takes the corresponding voltage readings. Additionally, this can be done for different sets of current values.
The Hall effect card inside the system switch contains a matrix grid, which looks like:
By closing appropriate cross-points, one can generate the various configurations. Primitively, one can do this manually on the switch, this code automates the process.
For the automation, we connect the devices via GPIB and type-B cables to the system and install their drivers. The details are given in the manual.
The instructions for use are given in the Manual.
The links to the references are given below:
