Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 47: Poster III
MA 47.5: Poster
Donnerstag, 21. März 2024, 15:00–18:00, Poster D
Crystallization behavior of Yttrium Iron Garnet thin films — •Sebastian Sailler1, Gregor Skobjin1, Benny Boehm4,5, Heike Schlörb2, Olav Hellwig4,5, Andy Thomas2,3, Sebastian T.B. Goennenwein1, and Michaela Lammel1 — 1Department of Physics, University of Konstanz, Konstanz — 2Leibniz Institute of Solid State and Materials Science, Dresden — 3TUD Dresden University of Technology, Dresden — 4Institute of Physics, Technische Universität Chemnitz, Chemnitz — 5Center for Materials Architectures and Integration of Nanomembranes (MAIN), TU Chemnitz, Chemnitz
Yttrium iron garnet (YIG) is a ferrimagnetic insulator commonly used in spin transport and spin dynamics. High quality, single crystalline YIG thin films are typically fabricated, e.g., using sputter deposition at room temperature with a subsequent annealing step to induce crystallization. Interestingly, however, the exact crystallization dynamics from the amorphous to the crystalline state have not been systematically studied. We therefore analyze the crystallization behavior of YIG films on different substrates utilizing extensive annealing temperature and time series. Structural characterization using X-ray techniques as well as electron backscatter diffraction allow to differentiate between amorphous, partially crystalline, polycrystalline and epitaxial films, and to determine the optimal annealing parameters for each substrate. Our results provide an in-depth understanding about the formation of crystalline YIG and allow for a rigorous control over the crystallization induced by the subsequent annealing step.
Keywords: Crystallization; Sputter Deposition; Thin Films; Yttrium Iron Garnet; Annealing