Thermomagnetic recording of highly Bi-substituted iron garnet film using scanning laser for spatial light modulation
Abstract Spatial light modulations (SLM) utilizing the magneto-optical (MO) effect of magnetic materials are expected to offer fast switching and small pixel sizes as small as the wavelength of the light. However, the small MO effect is a major issue. In this paper, we report a thermomagnetic recording of highly bismuth-substituted garnet film, known for large Faraday effects. Y 0.5 Bi 2.5 Fe 4 GaO 12 (Bi,Ga:YIG) film with a Faraday rotation of −4.66 degrees was used as an MO medium. A laser scanning thermomagnetic recording system using a Galvanometer mirror was developed and the size and quality of recorded magnetic domains were investigated. The smallest recorded magnetic domain diameter was 0.62 μm with a small standard deviation of 0.09 μm. Line patterns with a width of 1 μm can be recorded in this film. We found that Bi,Ga:YIG films have potential as a material for SLMs with fast switching, submicron pixel size, and large MO effect.
Authors
- Takayuki Ishibashi (ORCID: https://orcid.org/0000-0001-9803-9576)
- Hotaka Sakaguchi (ORCID: https://orcid.org/0000-0002-1749-8883)
- Hirofumi Nonaka (ORCID: https://orcid.org/0000-0001-8484-1541)
- Hiroyuki Awano (ORCID: https://orcid.org/0000-0002-9126-7282)
- Satoshi Sumi
- Jianjun Zhang (ORCID: https://orcid.org/0000-0002-2080-5194)
- Fatima Zahra Chafi
- Takuma Honma
Institutions
- Aichi Institute of Technology (JP)
- Toyota Technological Institute (JP)
- Nagaoka University of Technology (JP)
Publication Details
- Journal
- Japanese Journal of Applied Physics
- Published
- 2024-09-13
- DOI
- https://doi.org/10.35848/1347-4065/ad7a7c
- Citations
- 2
- Primary Topic
- Magneto-Optical Properties and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.42