Please use this identifier to cite or link to this item:
Title: New mechanism of linewidth maxima in ferrimagnetic resonance
Authors: Kumar, N.
Sinha, K.P.
Issue Date: 1968
Publisher: American Institute of Physics
Citation: Journal of Applied Physics, 1968, Vol.39, p1073
Abstract: A new mechanism for magnon-phonon relaxation process in ferrimagnetic insulators (e.g., YIG) is proposed which involves direct coupling of the magnons of various spin-wave modes with phonons of the transverse optical modes. This direct interaction emanates from the near-zone magnetic field associated with the transverse optical modes of vibrations in ionic lattices. The dominant part of the interaction term has the form . Hint= -i[ 2; <I>.,+(b.,+~.-h.c.) + 2; tf.'.A(b.'+~A~+a-h.c.)], tTt crt,X where <1>.,+ and tf,'.A are appropriate coupling constants and b •• +, ~A and "'A the phonon-creation and magnon"annihilation operators of the respective branches. These mechanisms lead to a temperaturedependent linewidth of ferrimagnetic resonance exhibiting maxima at certain values of temperature. An order of magnitude agreement with experimental results on YIG is obtained for a reasonable choice of parameters involved. Spin-phonon interaction processes due to transverse optical modes have been shown to playa significant role in the paramagnetic relaxation of some doped ionic crystals.
Description: Restricted Access
ISSN: 0021-8979
1089-7550 (Online)
Alternative Location:
Copyright: 1968 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Appears in Collections:Research Papers (TP)

Files in This Item:
File Description SizeFormat 
1968_Journal of Applied Physics_Vol.39_p1073.pdf
  Restricted Access
Restricted Access438.74 kBAdobe PDFView/Open Request a copy

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.