Giant Faraday Rotation in Metal-Fluoride Nanogranular Films

N. Kobayashi, K. Ikeda, Bo Gu, S. Takahashi, H. Masumoto, S. Maekawa

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Magneto-optical Faraday effect is widely applied in optical devices and is indispensable for optical communications and advanced information technology. However, the bismuth garnet Bi-YIG is only the Faraday material since 1972. Here we introduce (Fe, FeCo)-(Al-,Y-fluoride) nanogranular films exhibiting giant Faraday effect, 40 times larger than Bi-YIG. These films have a nanocomposite structure, in which nanometer-sized Fe, FeCo ferromagnetic granules are dispersed in a Al,Y-fluoride matrix.

Original languageEnglish
Article number4978
JournalScientific Reports
Issue number1
Publication statusPublished - 2018 Dec 1


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