Talk:Ferromagnetic resonance

Possible Disambig Page

I propose making FMR a disambiguation page that link to both Ferromagnetic resonance and Fidelity Investments. Fidelity's legal name is FMR (Fidelity Management & Resource). This talk page can serve as a discussion forum for those interested in voicing their opinions. I figure I'll change it in a week or so if there are no strong objections Hoopydink 05:15, 12 May 2006 (UTC)

Well it took me a while to remember my suggestion, but I've gone ahead and changed FMR to a disambig page. hoopydink^{Conas tá tú?} 01:12, 21 July 2006 (UTC)

Special case of ESR

Perhaps I'm missing something, but isn't this simply a special case of ESR applied to ferromagnetic materials? 84.92.241.186 14:22, 1 September 2007 (UTC)

Yes, it is, however in ferromagnetic materials there are additional interactions as exchange, stray-field (diploar),

and magnetocrystalline anisotropy. One of the main aims of FMR is to extract these parameters from the measurement.Matthias Buchmeier 19:20, 3 September 2007 (UTC)

There are very significant differences between FMR and ESR or EPR, as for example that the major ferromagnetic resonance usually occurs quite far from the g-value of the free electron resonance observed in ESR/EPR, because the large macroscopic magnetization of the ferromagnet does "subtract" from the external, applied magnetic field. Moreover, the anisotropy of FMR spectra can be very marked indeed, many orders of magnitude larger than any anisotropy observed in any paramagnetic solid; furthermore, there are close to zero field broad microwave resonance absorption bands caused by domain wall reorientation in the microwave field that are never observed in EPR/ESR; there are lots more differences which would become immediately apparent when the resonance equations are written down for ferromagnets and FMR, which this entry has not come around to do it yet (Why?). Nu 02:23, 11 April 2009 (UTC)Bci2Nu 02:23, 11 April 2009 (UTC)

The entry lacks inline references.

Definition on FMR

Hello,

I think there is a mistake in the first sentence of this page. FMR is not a spectroscopic technique. It is an effect appearing in materials under some conditions, that can be used for spectroscopy, but also for other applications as, for example, designing non-reciprocal microwave devices.

A better definition could be : The ferromagnetic resonance (FMR) is a coupling between an electromagnetic wave and the magnetization of a medium it passes through. This effect can be used for various applications such as spectroscopy or conception of non-reciprocal microwave devices.

What do you think about this ? VK Vivien (talk) 18:45, 2 May 2020 (UTC)

Agreed: resonance is a phenomenon not a technique. catslash (talk) 11:56, 19 May 2020 (UTC)