• Das, Sreeveni
• Flajšman, Lukáš
• Yao, Lide
• Mansell, Rhodri
• Van Dijken, Sebastiaan

Abstract

Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 860060 “Magnetism and the Effects of Electric Field” (MagnEFi). This work was supported by the Academy of Finland (Grant No. 338748). We acknowledge the use of the x-ray facilities and the scanning/transmission electron microscopes at the OtaNano-Nanomicroscopy Center of Aalto University. The authors thank Lars Peters for EDX measurements. | openaire: EC/H2020/860060/EU//MagnEFi ; Magnetic garnet thin films exhibiting perpendicular magnetic anisotropy (PMA) and ultra-low damping have recently been explored for applications in magnonics and spintronics. Here, we present a systematic study of PMA and magnetic damping in bismuth-substituted yttrium iron garnet (Bi-YIG) films grown on sGGG (111) substrates by pulsed laser deposition. Films with thicknesses ranging from 5 to 160 nm are investigated. Structural characterization using x-ray diffraction and reciprocal space mapping demonstrates the pseudomorphic growth of the films. The films exhibit perpendicular magnetic anisotropy up to 160 nm thickness, with the zero-magnetic field state changing from fully saturated for low thicknesses to a dense magnetic stripe pattern for thicker films. The films show a ferromagnetic resonance (FMR) linewidth of 100-200 MHz with a Gilbert damping constant of the order of 4 × 10 − 3 . The broad FMR linewidth is caused by inhomogeneities of magnetic properties on micrometer length scales. ; Peer reviewed

Topics

• impedance spectroscopy
• x-ray diffraction
• thin film
• iron
• Yttrium
• Energy-dispersive X-ray spectroscopy
• pulsed laser deposition
• Bismuth