Soft Magnetic Property of [Fe₈₀Ni₂₀-O/ZnO]_<i>n</i> Multilayer Thin Films for High-Frequency Application

Abstract

A series of [Fe80Ni20-O/ZnO]nmultilayer thin films with different ZnO separate layer thicknesses (t, from 0 to 3 nm) and fixed Fe80Ni20-O layer thickness (about 5 nm) have been fabricated on (100)-oriented silicon wafers and glass substrates by reactive magnetron sputtering. Microstructure analysis and static magnetic measurement results indicate that the magnetic properties of the films can be adjusted by the variation of ZnO monolayers thickness. All films reveal an evident in-plane uniaxial magnetic anisotropy (IPUMA). The values of in-plane uniaxial magnetic anisotropy fields (Hk) and resistivity (ρ) can be changed from 8 to 57 Oe and 62 to 168 μΩ•cm respectively with the t increasing. While the values of hard axis coercivity (Hch) and easy axis coercivity (Hce) reveal minimums of 1.5 and 3 Oe respectively at t = 1 nm.

Enhanced film thickness for Néel wall in soft magnetic film by introducing strong magnetocrystalline anisotropy

“…To accomplish these initiatives, researchers contributed greatly in this field. Néel wall can be formed in thicker soft magnetic films through several promising method, such as construction of multilayer structure films by inserting nonmagnetic insulating phase 9 10 11 12 or introduction of antiferromagnetic coupling 13 14 15 16 in Fe- or Co-based magnetic thin films. However, the construction of multilayer structure film is somewhat cumbersome and complex.…”