Talk:Magnetostriction

what is effect of magnetostriction on dry type of transformer to reduce the noise produced by magnetostriction effect.

Hum
120hz or 60hz hum near transformers? RJFJR 20:06, May 2, 2005 (UTC)


 * I would imagine both, plus harmonics. .  Also 50 or 100 in other countries. - Omegatron 20:43, May 2, 2005 (UTC)
 * Hi all, I removed the bit on the frequency being multiples of 100Hz or 120Hz. The dominant harmonics in a big power transformer are mostly odd, and the injection of even harmonics is heavily restricted. But that's irrelevant either way to the discussion of magnetostriction. 18.62.13.152 (talk) 02:39, 6 January 2014 (UTC)

Does anyone know if this is also the source of the noise in an MRI? NubinskiMXM
 * Basically, yes it is. It's the movement of scanning coils in response to the changing magnetic field.Cpmartin (talk) 14:14, 16 September 2008 (UTC)

Is it me or is that OGG of 60Hz hum completely f*cked? Doesn't sound like any mains hum I've ever heard. Sounds more like a slowed-down recording of a budgie. If anyone's got anything more typically illustrative that would be good!Cpmartin (talk) 14:14, 16 September 2008 (UTC)

Magnetomechanical Effect
Someone should add a short section on the Magnetomechanical effect (the inverse of magnetostriction) in the article.

A good reference is in Introduction to Magnetism and Magnetic Materials By David Jiles, towards the back of the book if i can remember clearly.

I know I should, but I am too lazy! and too busy of cause. ;-p

Samlaw (talk) 14:22, 8 July 2008 (UTC)


 * I have added a link to Inverse magnetostrictive effect, does this help? Marechad (talk) 18:34, 1 July 2010 (UTC)

Animation is distracting
The animation image on this article is distracting, makes it hard to read. It is often recommended to avoid animations, see for example http://www.useit.com/alertbox/990502.html or http://universalusability.com/access_by_design/images/animated.html - recommend replacing the animation with static image(s). --mcld (talk) 07:08, 24 August 2009 (UTC)
 * P.S. wkp's policy recommends against animated images being inlined in articles: Image_use_policy  --mcld (talk) 07:11, 24 August 2009 (UTC)


 * I'd have to disagree; this is an AC effect that cannot be illustrated well with a static image. The Wikipedia policy is to use animations sparingly, notwithstanding the opinion on useit.com. -W0lfie (talk) 16:12, 9 November 2009 (UTC)
 * What exactly is it illustrating? What does the grey arrow represent? Magnetostriction is not inherently an AC effect, so an animation confuses the issue. RockMagnetist (talk) 14:16, 16 September 2010 (UTC)

Applications of Magnetostriction?
1. Magnetostriction is the working principle of magnetostriction oscillator which is used to produce     ultrasonic waves of frequencies up to 3MHz. — Preceding unsigned comment added by 49.203.81.8 (talk)  03:15, 13 August 2011

change in length
As the reference given at the bottom of article does, I believe it should be clearly stated that change in length can either be positive or negative:

The coefficient Λ may be positive or negative — Preceding unsigned comment added by 79.45.158.211 (talk) 10:43, 6 October 2014 (UTC)

Magnetostriction in antiferromagnets and ferrimagnets
Magnetostriction does not only occur in ferromagentic materials.

For ferrimagnets such as TbFe2 and DyFe2 see: Clark, A. E.; Belson, H. S. (1972): Giant Room-Temperature Magnetostrictions in Tb Fe2 and Dy Fe2. In: Phys. Rev. B 5 (9), S. 3642–3644. DOI: 10.1103/PhysRevB.5.3642.

Antiferromagnets such as the rare earth elements such as Dy and Ho see: Darnell, F. J. (1963): Temperature Dependence of Lattice Parameters for Gd, Dy, and Ho. In: Phys. Rev. 130 (5), S. 1825–1828. DOI: 10.1103/PhysRev.130.1825. or: Darnell, F. J. (1963): Magnetostriction in Dysprosium and Terbium. In: Phys. Rev. 132 (1), S. 128–133. DOI: 10.1103/PhysRev.132.128.

thus I would vote for changing the first sentence of the article to: Magnetostriction (cf. electrostriction) is a general property of magnetic materials that causes them to change their shape or dimensions during the process of magnetization. --Goldfinger25 (talk) 12:04, 7 January 2020 (UTC)
 * Good point. I have changed the wording as you suggest. If I have time later, I'll incorporate your sources into the section on magnetostrictive materials. Or you could do it. RockMagnetist(talk) 18:14, 7 January 2020 (UTC)

Possible spam link
Wahi, Sajan K.; Kumar, Manik; Santapuri, Sushma; Dapino, Marcelo J. (2019-06-07). "Computationally efficient locally linearized constitutive model for magnetostrictive materials". Journal of Applied Physics. 125 (21): 215108. Bibcode:2019JAP...125u5108W. doi:10.1063/1.5086953. ISSN 0021-8979. The above 2019 paper is a primary source, and the text at the end of the "Constitutive behavior of magnetostrictive materials" subsection isn't particularly encyclopedic. I'm going to remove it all if nobody states a convincing objection.--Quisqualis (talk) 05:27, 4 February 2021 (UTC)