Fabrication of Magnetic Metal-Insulator Composite Film Using the LbL-Assisted Composite Plating Method
- Resource Type
- Periodical
- Authors
- Fujita, N.; Takeuchi, M.; Watanabe, Y.; Yokoi, A.; Tan, W.K.; Naoe, M.; Muto, H.
- Source
- IEEE Transactions on Magnetics IEEE Trans. Magn. Magnetics, IEEE Transactions on. 60(4):1-6 Apr, 2024
- Subject
- Fields, Waves and Electromagnetics
Surface treatment
Plating
Cathodes
Acoustics
Particle measurements
Magnetic films
Electric potential
Electromagnetic (EM)-wave-absorbing material
layer-by-layer (LBL) method
LBL-assisted composite plating method
metal-insulator composite thin film
- Language
- ISSN
- 0018-9464
1941-0069
Magnetic fine particle-insulator composite films containing Fe-Ni fine particles and insulating epoxy films used for electromagnetic (EM)-wave-absorbing films were synthesized by a newly developed electrochemical method termed the “layer-by-layer (LbL)-assisted composite plating method.” A reaction solution containing water-soluble epoxy resin and Fe-Ni fine particles was used for film fabrication. Cu substrates and Ti/Pt plates were used as the cathode and the anode, respectively. In LbL-assisted composite plating, the attraction of charged Fe-Ni fine particles to the cathode by electrostatic force and electrodeposition of insulating epoxy film occurred simultaneously. LbL treatment was performed using poly(sodium 4-styrenesulfonate) (PSS) solution and poly(diallyldimethylammonium chloride) (PDDA) solution to induce negative and positive surface charge of the Fe-Ni fine particles, respectively. It is found that LbL treatment is effective for increasing charging electrons on Fe-Ni fine particles and for enhancing their dispersibility in the reaction solution. Over 39 vol.% Fe-Ni particles contained in the epoxy films were successfully obtained by using the LbL-assisted composite plating method.