Andrew Kent of New York University

Spin-Hall nano-oscillators (SHNOs) are promising spintronic devices to realize current controlled GHz frequency signals in nanoscale devices for neuromorphic computing and creating Ising systems. However, traditional SHNOs devices based on transition metals have high auto-oscillation threshold currents as well as low quality factors and output powers. Here we demonstrate a new type of hybrid SHNO based on a permalloy (Py) ferromagnetic-metal nanowire and low-damping ferrimagnetic insulator, in the form of epitaxial lithium aluminum ferrite (LAFO) thin films. The superior characteristics of such SHNOs are associated with the excitation of larger spin-precession angles and volumes. We further find that the presence of the ferrimagnetic insulator enhances the auto-oscillation amplitude of spin-wave edge modes, consistent with our micromagnetic modeling. This hybrid SHNO expands spintronic applications, including providing new means of coupling multiple SHNOs for neuromorphic computing and advancing magnonics.

Biography:

ANDREW KENT is a Professor of Physics and the Founding Director of the Center for Quantum Phenomena at New York University. He received a B.Sc. with Distinction in Applied and Engineering Physics at Cornell University and his Ph.D. from Stanford University in Applied Physics. His research interests are at the intersection of physics of magnetic nanostructures, nanomagnetic devices and magnetic information storage. He is a fellow of the American Physical Society (APS) and the Institute of Electrical and Electronic Engineers (IEEE). He received an Honorary Doctorate from the University of Lorraine, France, in 2013, the French Jean d'Alembert Research Fellowship in 2017, and was named professor at the University of Lorraine in 2018 and in 2023.

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