Talk:Van der Pauw method

message: Cleanup tag removed as I believe I have sufficiently cleaned this page up. It still requires some additions (which I plan to do in the next few days) but it is now in a 'clean' state.
Blair - Speak to me 05:32, 25 June 2006 (UTC)
thread_title:  Removal Of Cleanup Tag 

message: The Hall measurements section is at least complete now, though I have plans for further improvement. Blair - Speak to me 04:44, 7 October 2006 (UTC)
thread_title:  Hall measurements complete 

message: I don't think that this iterative solver works.  At least for my values of R it didn't.  Apparently, it uses the Banach fixed point theorem and its preconditions are not fulfilled.  I recommend to recommend nested intervals for solving the equation. – Torsten Bronger 11:49, 26 January 2007 (UTC)
thread_title:  Iterative solver 

message: "The Van der Pauw Method is a commonly used technique, based around the Hall effect" should be changed to "The Van der Pauw Method is a commonly used technique, used to measure resistivity and Hall coefficient".,,,
Van der Pauw's original paper says "sheet resistivity and Hall Effect" throughout the paper, so clearly, Van der Pauw thought that the two things were separable.  Moreover, the second part of the sentence states "be successfully completed with a current source and a voltmeter," but the Hall coefficient measurement requires an external magnetic field to induce the Hall Effect in the sample.
The second paragraph seems to be missing a bullet which therefore states "Hall coefficient of the material," since that's the second part of Van der Pauw's paper as well as the second part of the Wikipedia article.  
I would suggest "presented" instead of "propounded" since Van der Pauw uses "presented" in his summary.  —Preceding unsigned comment added by IRStuff (talk • contribs) 17:50, 23 November 2007 (UTC)
thread_title:  Some comments 

message: It's unclear that an iterative solution is required.  Van der Pauw gives an equation for which f is a solution based on Rab,cd and Rbc,da.  This would seem to be an easy target for an Excel-based or Mathcad solver.  
I would suggest just putting equations 11 and 12 from Van der Pauw's article into the Wikipedia article and let the reader deal with finding a numerical solution for f.  —Preceding unsigned comment added by IRStuff (talk • contribs) 18:33, 23 November 2007 (UTC)
thread_title:  Iterative solution 

message: The introduction says the method allows one to "accurately measure the properties of a sample of any arbitrary shape" (emphasis mine), but then in the article itself it turns out there are actually a lot of restrictions on the shape of the sample: it must "have a flat shape of uniform thickness", must not "have any isolated holes" and should ideally have the cloverleaf form shown in the picture. How can this be reconciled with the claim that it is good for arbitrary shapes? --188.99.236.164 (talk) 20:41, 3 April 2016 (UTC)
thread_title:  Arbitrary shape - Contradiction? 

message: Is there not substantial overlap between these two sections? Could they not be usefully combined? Moletrouser (talk) 09:14, 5 December 2019 (UTC)
thread_title:  Conditions & Sample preparation