AIP Advances (Jan 2020)

Magnetic properties of Fe-Ni-system films prepared by electroless deposition

  • Takeshi Yanai,
  • Ryoma Tanaka,
  • Ryoya Ueno,
  • Kafu Mieda,
  • Junichi Kaji,
  • Takao Morimura,
  • Akihiro Yamashita,
  • Masaki Nakano,
  • Hirotoshi Fukunaga

DOI
https://doi.org/10.1063/1.5130446
Journal volume & issue
Vol. 10, no. 1
pp. 015047 – 015047-4

Abstract

Read online

We prepared Fe-Ni thick-films (> 1 μm) using an electroless deposition method and evaluated the magnetic properties and the crystal structures. The deposition rate depended on the concentration of dimethylamine-borane (DMAB), which is a reducing agent used in the present study, and we obtained a high deposition rate (> 10 μm/h) for Fe30Ni70 films when the DMAB concentration is higher than 3 g/L. From structural analyses of the films, we found that the films have very fine fcc Fe-Ni crystals in the amorphous magnetic phase. From the investigation of Co additives for the improvement in the surface conditions, we confirmed that a small amount of Co effectively works to obtain the smooth surfaces. As a result, we could obtain the Fe-Ni-system thick-films with low coercivity (50 A/m) and smooth surfaces.