The van der Pauw Method is a technique commonly used to measure the resistivity and the Hall coefficient of a sample. Its power lies in its ability to accurately measure the properties of a sample of any arbitrary shape, so long as the sample is approximately two-dimensional (i.e. it is much thinner than it is wide) and the electrodes are placed on its perimeter.
From the measurements made, the following properties of the material can be calculated:
- The resistivity of the material
- The doping type (i.e. whether it is a P-type or N-type material)
- The sheet carrier density of the majority carrier (the number of majority carriers per unit area). From this the charge density and doping level can be found
- The mobility of the majority carrier
The method was first propounded by Leo J. van der Pauw in 1958 .
Read more about Van Der Pauw Method: Conditions, Sample Preparation, Measurement Definitions, Resistivity Measurements
Famous quotes containing the words van, der and/or method:
“Linguistically, and hence conceptually, the things in sharpest focus are the things that are public enough to be talked of publicly, common and conspicuous enough to be talked of often, and near enough to sense to be quickly identified and learned by name; it is to these that words apply first and foremost.”
—Willard Van Orman Quine (b. 1908)
“Under the lindens on the heather,
There was our double resting-place.”
—Walther Von Der Vogelweide (1170?–1230?)
“Government by average opinion is merely a circuitous method of going to the devil; those who profess to lead but in fact slavishly follow this average opinion are simply the fastest runners and the loudest squeakers of the herd which is rushing blindly down to its destruction.”
—Thomas Henry Huxley (1825–95)