Talk:Delta E effect

This page has been recently proposed for deletion (13 September 2025) by JoeNMLC (talk · contribs).

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Redirect?

@JoeNMLC, why not just redirect to Magnetomechanical effects or add a sentence or two to Magnetostriction using something like https://link.springer.com/chapter/10.1007/978-3-030-79325-8_4. It is not notable enough for an article by itself, but it is documented. I suggest just doing the redirect. Ldm1954 (talk) 14:08, 14 September 2025 (UTC)[reply]

@Ldm1954 - thank you for the suggestion. Unfortunately, doing redirect is beyond my skillset. Also, I am not qualified about this topic. Perhaps another editor may help? Regards, JoeNMLC (talk) 14:37, 14 September 2025 (UTC)[reply]

I can do it later. I will first post at WT:PHYSICS to see if anyone wants to rescue the page. Ldm1954 (talk) 14:49, 14 September 2025 (UTC)[reply]

Addendum, based upon DOI:10.1109/TMAG.2017.2674604 this is sn earlier name for "DE effect" Ldm1954 (talk) 17:22, 14 September 2025 (UTC)[reply]

I added a primary source, but still this article might be better suited as a section in some other article.--ReyHahn (talk) 19:32, 14 September 2025 (UTC)[reply]

I see you beat me to additions. I tweaked to mention that ot is not just E, although people state that as KISS. I think a little more specifics on why in terms of domain walls would be useful, e.g. this. I cannot read the chapter of the book you cite to know if it is there as well Ldm1954 (talk) 17:09, 16 September 2025 (UTC)[reply]

Comment: with the edits by ReyHahn I think the page is now in good enough shape to stay as a stub.Ldm1954 (talk) 17:48, 16 September 2025 (UTC)[reply]

Any idea of who is Guillemin?

According to the primary source he is just referred as Mr. Guillemin. I do not know where the A. Guillemin came from in later citations. I do not think it is the painter Alexandre-Marie Guillemin nor the physicist Auguste Guillemin [fr] (he was 4 years old), it could be the science popularizer Amédée Guillemin or some other fr:Guillemin not necessarily starting with "A". ReyHahn (talk) 08:43, 15 September 2025 (UTC)[reply]

Williams 1931 does not give an initial, but Garshelis and Kari 2017 refer to "A. Guillemin" in the reference list. Jähmefyysikko (talk) 09:15, 15 September 2025 (UTC)[reply]

Yes, as some other sources but the question is what does that A. stand for.--ReyHahn (talk) 14:51, 15 September 2025 (UTC)[reply]

I searched archive.org and elsewhere for "Guillemin effect". No luck, but the impression I got that this is not a very notable subject (at least under that name). I don't think it is Amédée, his career seems to have started only later. Bozorth (1993) Ferromagnetism tells that Auerbach (1920) Handbuch der Elektrizität und des Magnetismus reviews the early literature. That might or might not contain the answer. In any case, that book is not available online. Jähmefyysikko (talk) 15:50, 15 September 2025 (UTC)[reply]

The only extra piece of evidence I have is that Guillemin signs "Commission de chemins de fer" (the national train service). Amédée wrote a book on trains so he or somebody in his family could be behind it. Eugène Guillemin [fr] worked in the train service but he is just 3 years older.--ReyHahn (talk) 17:57, 16 September 2025 (UTC)[reply]

Getting closer. Looking at other "comptes rendus" of the French Science Academy I noticed that there is C.-M. Guillemin that appears from time to time. According to A. J. Butrica "From inspecteur to ingénieur: telegraphy and the genesis of electrical engineering in France, 1845-1881" (1986), Claude-Marie Guillemin (1822—1874) was known also as Alexandre Guillemin. This is the closest I have but no direct confirmation.--ReyHahn (talk) 15:30, 17 September 2025 (UTC)[reply]

I converged to Claude-Marie, see Talk:Magnetomechanical effects.--ReyHahn (talk) 12:49, 18 September 2025 (UTC)[reply]

Name of the article

If we keep this article (or just the section in magnetomechanical effect) we should rename it to ΔE effect as this is the more general name, "Guillemin effect" is cited as either the historical name or a more specific effect. ReyHahn (talk) 15:01, 15 September 2025 (UTC)[reply]

Agreed. although I found more sources as "Delta E effect". We should retain the credit for him. I think we should probably expand it enough as the topic "Delta E" has enough sources for at least a stub. Ldm1954 (talk) 15:48, 15 September 2025 (UTC)[reply]