Evidence for strain control of magnetic anisotropy in epitaxial nickel ferrite thin films grown on strontium titanate substrates

This report is on strain control of magnetic order parameters in 50 nm epitaxial NiFe2O4 (NFO) films grown (001), (110), and (111) SrTiO3 (STO) single-crystal substrates by pulsed laser deposition. The related in-plane strains for NFO STO are found to be ―1.36 %, 1.35 1.52 respectively, where the lattice mismatch between film substrate as high 6.7 %. Our analysis magnetization ferromagnetic resonance all reveals presence a uniaxial anisotropy field, which perpendicular plane. field decreases with increase films. Specifically, (001) have lowest highest fileds 1.4 kOe 6.1 kOe, respectively. These experimental values factor 5–10 times smaller than those calculated ones due defects induced mismatch. studies spinel ferrite interest spintronics microwave devices.