Talk:Giant magnetoresistance

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[edit] Image on GMR spin valve

Just have to say that I tell students off on a weekly basis for producing images that are as poorly annotated as the one in this article. What do the arrows and lines signify? What is the circuit at the bottom of the image supposed to signify?

The whole image is highly confusing and misleading and needs to be replaced or given a major overhaul. --Lateralis (talk) 10:27, 11 February 2008 (UTC)


[edit] Discoverers

It is false that the team that created the first product based on GMR was led by Stuart Parkin. Stuart Parkin is well known for plagiarising other groups work. In fact the team was led by Virgil Speriosu. The idea for the spin valve originated with Bruce Gurney and Bernard Dieny, a French visiting scientist. Parkin's role in the invention of the spin valve is relatively insignificant although he made major contributions to the underlying science.

I know about this since:

a) I was already working on GMR before Dieny, Gurney and Speriosu submitted their first paper;

b) I visited IBM Almaden in 1991 and talked to the team before their work was published.

-- Alison Chaiken, alison@wsrcc.com

I left the "discovery" section intact, but from all the papers I have seen, GMR was actually first reported in the literature by M. N. Baibich (in an article with Albert Fert as a co-author). Is there any reason that his name has been left out of the article? Even if he was a student and Albert Fert was the driving force behind the research (always a crap excuse used by professors who want to take credit for research done by their students), the team obviously decided to put M. N. Baibich as first author on the paper and I don't see why he should be left out.
—Preceding unsigned comment added by Mattopia (talk • contribs) 08:53, 10 October 2005
I've rewritten the section, but I'm not about to start listing everybody in the research teams. Since the article is on the GMR, rather than devices based on the GMR, I have no problem in highlighting someone who made major contributions to the underlying science. Average Earthman 17:16, 10 October 2005 (UTC)

[edit] Hard drives

The article makes a few references to hard drives, and even says "As stated above, GMR has been used extensively in the read heads in modern hard drives." But isn't really "stated above" so the references are a bit confusing. Sewebster 02:37, 14 December 2006 (UTC)

This is fairly coherent and might provide the basis for a few sentences in the article. --JWSchmidt 14:10, 11 October 2007 (UTC)

[edit] Combine pages?

The Giant_magnetoresistive_effect and Giant_magnetoresistive pages appear to be the same, should they be combined or one of them deleted or what? —Preceding unsigned comment added by 216.162.53.230 (talk) 15:58, 12 September 2007 (UTC)

They appear to be the same because they are the same...one redirects to the other, which is as it should be. —Lowellian (reply) 17:26, 9 October 2007 (UTC)

[edit] Confusing Language

"The effect manifests itself as a significant decrease in resistance from the zero-field state, when the magnetization of adjacent ferromagnetic layers are antiparallel due to a weak anti-ferromagnetic coupling between layers, to a lower level of resistance when the magnetization of the adjacent layers align due to an applied external field."

This is a horrible sentence. Would someone who knows what it is trying to say please fix it. 130.225.26.145 11:23, 9 October 2007 (UTC)

What exactly is meant by "decrease in resistance"? What is zero-field state? Does weak anti-ferromagnetic means it is cause by the weak force?? Please! Somebody write something understandable here! (thanks). —Preceding unsigned comment added by 83.31.67.27 (talk) 14:38, 9 October 2007 (UTC)
I agree that it was not coherent English. I tried to fix it based on this, but my physics knowledge is not great. --JWSchmidt 13:49, 11 October 2007 (UTC)