Magnetization spin dynamics in a (LuBi)3Fe5O12 (BLIG) epitaxial film

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:448

Article; Proceedings Paper

Malathi, M.¹  Venkat, G.¹  Arora, A.¹  Syvorotka, I. I.²  Sivasubramanian, V.³  Prabhakar, A.¹ 

[1] Indian Inst Technol Madras, Dept Elect Engn, Madras 600036, Tamil Nadu, India

[2] Sci Res Co Carat, Dept Crystal Phys & Technol, Lvov, Ukraine

[3] Indira Gandhi Ctr Atom Res, HBNI, Condensed Matter Phys Div, Kalpakkam 603102, Tamil Nadu, India

关键词: Magnetization dynamics;    Multi domain micro-magnetic simulations;    Brillouin light scattering;    Spin waves;    Faraday rotation;   

DOI  :  10.1016/j.jmmm.2017.06.011

来源: Elsevier

【 摘 要 】

Bismuth substituted lutetium iron garnet (BLIG) films exhibit larger Faraday rotation, and have a higher Curie temperature than yttrium iron garnet. We have observed magnetic stripe domains and measured domain widths of 1.4 mu m using Fourier domain polarization microscopy, Faraday rotation experiments yield a coercive field of 5 Oe. These characterizations form the basis of micromagnetic simulations that allow us to estimate and compare spin wave excitations in BLIG films. We observed that these films support thermal magnons with a precessional frequency of 7 GHz with a line width of 400 MHz. Further, we studied the dependence of precessional frequency on the externally applied magnetic field. Brillouin light scattering experiments and precession frequencies predicted by simulations show similar trend with increasing field. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free