Dense nanocrystalline yttrium iron garnet films formed at room temperature by aerosol deposition. (April 2016)

• Record Type: Journal Article
• Authors: Johnson, Scooter D.; Glaser, Evan R.; Cheng, Shu-Fan; Hite, Jennifer
• Is Part Of: Materials research bulletin. Volume 76(2016)
• Page Start: 365
• Page End: 369
• Publication Date: 2016-04
• Subjects: A. Ceramics -- A. Magnetic materials -- A. Nanostructures -- B. Microstructure -- B. Magnetic properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.12.024
• Languages: English
• ISSNs: 0025-5408

Abstract

Abstract : Graphical abstract: Abstract : Highlights: We deposit yttrium iron garnet films at room temperature using aerosol deposition. Films are 96% of theoretical density for yttrium iron garnet. We report magnetic and structural properties post-deposition and post-annealing. Low-temperature annealing decreases the FMR linewidth. We discuss features of the FMR spectra at each anneal temperature. Abstract: We have employed aerosol deposition to form polycrystalline yttrium iron garnet (YIG) films on sapphire at room temperature that are 90–96% dense. We characterize the structural and dynamic magnetic properties of the dense films using scanning electron microscopy, X-ray diffraction, and ferromagnetic resonance techniques. We find that the as-deposited films are pure single-phase YIG formed of compact polycrystallites ∼20 nm in size. The ferromagnetic resonance mode occurs at 2829 G with a linewidth of 308 G. We perform a series of successive anneals up to 1000 °C on a film to explore heat treatment on the ferromagnetic resonance linewidth. We find the narrowest linewidth of 98 G occurs after a 750 °C anneal.