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Condensed Matter / Biophysics Seminar – Julius de Rojas, Oklahoma State
Current(less) Trends in Spintronics: Magnetoionics & Magnonics for Energy Efficient Devices
Fundamental hurdles, including power constraints and manufacturing limitations, have left conventional computing hardware struggling to maintain energy efficiency as dimensions continue to shrink, leading to several approaches to low-energy data storage and processing. In this talk, I will present magneto-ionics and magnonics, two emerging branches of spintronics which offer potential as low-energy platforms for data storage and processing. I will then present our study of magneto-ionics in oxygen-based and nitrogen-based systems as a low-energy means to toggle magnetization states. I will focus on the “structural ion” approach, in which the mobile ions are already present in the target material and discuss its potential advantages and challenges. I will then conclude with our investigation into the static and dynamic behavior of “pseudo-3D” trilayer square artificial spin ice structures for magnonic applications, in which a nonmagnetic copper layer of varying thick-ness is inserted between Permalloy (Ni81Fe19) layers. We show that the copper thickness enables interlayer coupling between layers to be finely controlled, leading to bespoke magnetization states and resonance spectra tuning, a potentially programmable degree of freedom for magnonic and microwave devices.