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Van der Pauw method including anisotropy and probe positioning correction factors using approximate closed-form analytical functions

by: Member
‎03-18-2022 07:50 AM
Last Edited by: Member simon.hurand ‎03-18-2022 07:53 AM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Operating System

  • Windows

    Programming Language

  • LabVIEW G

Code and Documents

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Description

The vi "Van der Pauw complete.vi" extracts the sheet resistance and effective anisotropy of a square sample in a 4-probes van der Pauw configuration, including the correction factors due to resistivity anisotropy or probes mispositioning. It works on the "Example porous ITO on Al2O3.hall" example text file.

The others vis are the sub-vis used in "Van der Pauw complete.vi". They can be used independently.

These correction factors use approximate closed-form analytical expressions from Ref. [Hurand et al., Rev. Sci. Instr. 2022] that make programing much easier than solving the van der Pauw equation and the corresponding correction factors equations iteratively. Therefore, they might be of a great help to experimentalist performing van der Pauw measurements, including anisotropic samples or probes mispositionning.

 

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.

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