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Enhancement of Brillouin light scattering signal with anti-reflection layers on magnetic thin films

Title
Enhancement of Brillouin light scattering signal with anti-reflection layers on magnetic thin films
Authors
Jeong, JinyongKim, June-SeoKim, JoonwooCho, JaehunYou, Chun-Yeol
DGIST Authors
Jeong, Jinyong; Kim, June-Seo; Kim, Joonwoo; Cho, Jaehun; You, Chun-Yeol
Issue Date
2020-05
Citation
Journal of Magnetism and Magnetic Materials, 502, 166565
Type
Article
Article Type
Article
Keywords
MAGNETOOPTICAL OBSERVATIONANALYTIC FORMULASMULTILAYERSANISOTROPYEXCHANGE
ISSN
0304-8853
Abstract
The significant enhancement of Brillouin light scattering (BLS) spectroscopy intensity in a ferromagnetic thin film with an additional dielectric anti-reflection layer is experimentally investigated. The anti-reflection layer thickness dependent BLS measurements on ferromagnetic layers are performed systematically. Consequently, we observe that BLS signals are dramatically enhanced by more than 450% at a specific dielectric layer thickness due to the pure optical effect. Because of the large signal enhancements, the errors of the spin wave resonance peak frequencies are noticeably reduced as well. Since many magnetic properties such as the saturation magnetization, the surface anisotropy, and the exchange stiffness constant are determined by the spin wave resonance frequencies from the BLS spectra, the additional anti-reflection layer can help to improve the reliability of BLS experiments. Especially, the BLS signal improvement plays a crucial role in the precise determination of the interfacial Dzyaloshinskii-Moriya interaction (iDMI) energy density, since the iDMI energy density is calculated from the difference of Stokes and anti-Stokes resonance frequencies, which is typically order of 1 GHz. © 2020
URI
http://hdl.handle.net/20.500.11750/11617
DOI
10.1016/j.jmmm.2020.166565
Publisher
Elsevier BV
Related Researcher
  • Author You, Chun-Yeol Spin Phenomena for Information Nano-devices(SPIN) Lab
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
Files:
There are no files associated with this item.
Collection:
Division of Nanotechnology1. Journal Articles
Department of Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles


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