Controlling magnon interaction at nanoscale

Igor Barsukov

doi:10.1117/12.2595558

1 August 2021 Controlling magnon interaction at nanoscale

Igor Barsukov

Proceedings Volume 11805, Spintronics XIV; 1180506 (2021) https://doi.org/10.1117/12.2595558
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

We develop an approach for toggling magnon processes at nanoscale. We demonstrate an experimental proof-of-concept in magnetic tunnel junction nanodevices, consisting of a free layer and a synthetic antiferromagnet. By triggering the spin-flop transition in the synthetic antiferromagnet and utilizing its nonuniform dipole field, we controllably modify magnon interaction in the free layer. We achieve its tunability by at least one order of magnitude and realize two distinct dissipative states. The results open up an avenue for controlling magnon processes by external stimuli at nanoscale and show prospects for a variety of spin-torque applications, magnetic neural networks, and hybrid quantum information technologies. An immediate consequence of modified magnon interaction is nanomagnet's response to spin-torques. In particular, we show that degenerate resonant three-magnon process inverts an antidamping spin-torque into a torque that enhances dissipation. Supported by NSF-ECCS-1810541.

Conference Presentation

Citation Download Citation

Igor Barsukov "Controlling magnon interaction at nanoscale", Proc. SPIE 11805, Spintronics XIV, 1180506 (1 August 2021); https://doi.org/10.1117/12.2595558

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