[17p-D704-1~16] 10.1 Emerging materials in spintronics and magnetics (including fabrication and characterization methodologies)

[17p-D704-16] Effect of B-site substitution element and substitution amount on magnetic properties in (Bi,La)(Fe_1-yM_y)O₃ (M = Co, Ni) ferromagnetic and ferroelectric thin films

Yuta Suzuki¹, Takumi Ozeki¹, Genta Egawa¹, 〇Satoru Yoshimura¹ (1.Akita Univ.)

Keywords:Multiferroic thin films, perpendicular magnetic anisotropy, Curie temperature

High saturation magnetization, perpendicular magnetic anisotropy, and high Curie temperature are required for ferromagnetic/ferroelectric thin films to apply to highly integrated magnetic devices driven by electric field. To improve the magnetic properties of the BiFeO₃-based ferromagnetic/ferroelectric thin films, (Bi,La)(Fe_1-yCo_y)O₃ or (Bi,La)(Fe_1-yNi_y)O₃ films were fabricated. As a result, the high saturation magnetization of 78 emu/cm³ was obtained in (Bi,La)(Fe,Co)O₃ with the Co substitution of 25 at%, and high perpendicular magnetic anisotropy and high Curie temperature of more than 475 °C were obtained respectively in (Bi,La)(Fe,Ni)O₃ with the Ni substitution of 30 at%.