[17p-P01-1~16] 6.4 Thin films and New materials

English Presentation

[17p-P01-1] High Frequency MO Imaging of Bismuth-substituted Europium Iron Garnet

〇MdAbdullahAl Masud¹, Wataru Asano¹, Shuichiro Hashi², Takao Nishi³, Daiki Oshima⁴, Takeshi Kato⁴, Kiejin Lee⁵, Masami Kawahara⁶, Fatima Zahra Chafi¹, Masami Nishikawa¹, Takayuki Ishibashi¹ (1.Nagaoka Univ. Tech., 2.Tohoku-Gakuin Univ., 3.Kobe City Coll. Tech., 4.Nagoya Univ., 5.Sogang Univ., 6.Kojundo Chem.)

Keywords:

Magneto-optical imaging,Metal-organic decomposition,Gyromagnetic ratio

Nd0.5Bi2.5Fe5O12 thin films have been developed in our laboratory for magneto-optical (MO) imaging up to 6 GHz, but higher frequencies require enhanced MO properties. Recent studies by our group have achieved magnetization and angular momentum compensation in Eu0.5Bi2.5Fe5-xGaxO12 (Eu,Ga:BIG) at room temperature. This study measures MO signals at high frequencies using Eu,Ga:BIG garnet thin films to evaluate their performance in high frequency region. Thin films with varying Ga content (x=0-2) were prepared via metal-organic decomposition method, achieving a thickness of ~150 nm. Using a micro strip line (MSL) configuration, Faraday rotation angles were measured from 0.05 to 10 GHz. Results showed that increasing Ga content shifts the Faraday rotation peak to higher frequencies. Additionally, magnetic field distribution was analyzed.