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MA: Fachverband Magnetismus
MA 28: Thin Films: Magnetic Anisotropy
MA 28.4: Vortrag
Mittwoch, 20. März 2024, 15:45–16:00, EB 107
Spin Wave Modes in YIG Thin Films with Perpendicular Magnetic Anisotropy — •Zeynep Reyhan Öztürk1 and Fikret Yildiz2 — 1SESAME, Amman, Jordan — 2Gebze Technical University, Kocaeli, Türkiye
This study investigates the importance of magnetic anisotropy in advancing magnetic memory and logic applications, particularly focusing on achieving perpendicular magnetic anisotropy (PMA) in thick ferrimagnetic films using Yttrium Iron Garnet (YIG).
YIG, known for its unique properties in spintronics and magnonics, was utilized to deposit textured crystalline thin films on Si (100) substrates through Pulsed Laser Deposition. Successful realization of PMA, especially in films around 100 nm thick, was attributed to compressive strain at the Si/YIG interface induced by lattice mismatch. The study's in-depth analysis revealed multiple spin wave modes, with the estimated exchange stiffness constant for YIG films. Noteworthy is the rare coexistence of spin wave modes with PMA in YIG thin films up to 120 nm.
These findings contribute significantly to advanced magnonics and insulating spintronics. Importantly, the study achieved PMA without additional layering or doping on silicon substrates, offering a cost-effective and compatible fabrication process. Ongoing experiments, such as XMCD measurements, aim to explore strain-induced anisotropy and the spatial distribution of spin-polarized electrons in YIG films for faster spin wave computing devices and advanced magnonic logic applications.
Keywords: Insulating spintronics; Perpendicular Magnetic Anisotropy; Yttrium Iron Garnet (YIG); Ferromagnetic resonance; Spin waves