Giant Magnetoresistive Effect

Frank Gentges fgentges at
Sat Jul 3 09:36:01 CDT 2004

I suspect the GMR (giant magnetoresistive) effect may have some simple 
applications.  It has taken over the hard dirive read head technlology.  

The basic concept is better explained by IBM research at:

Commercial sensors are available at Digikey and are made by Nonvolatile 
Electronics at:

It looks like a fruitful area for experimentation.  My initial thought 
is to make a tiny little probe to sense current in tiny PC board traces 
for testing and diagnostic work.  Perhaps a GMR head salvaged from a 
defective hard drive could be adapted.

Search on Google for "giant magnetoresistive" for lots of links.  I've 
listed some of the first and best.

Frank K0BRA

More information about the Tacos mailing list