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The progression went Hall probe/others -> AMR -> GMR -> TMR where each step made a big change in areal density. TMR can be thought of as an improved GMR -- by tunneling between magnetic layers instead of conducting through a non-magnetic spacer you get a lot better sensitivity. The article
Disk read-and-write head has a decent summary. I'll try to clarify here.
a13ean (
talk)
19:58, 25 June 2012 (UTC)reply
Confusing Pseudo-intellectual Introduction
This statement in the intro is not clear without some info about its relevance. Someone is trying to look smart but in a meaningless way: "Since this process is forbidden in classical physics, the tunnel magnetoresistance is a strictly quantum mechanical phenomenon." Classical physics vs. quantum mechanics -- impressive. Why should anyone care? --
Jelsova (
talk)
23:13, 15 October 2018 (UTC)reply