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4 October 2024 Spin-torque antiferromagnetic resonance in a single nanoscale device
Igor Barsukov
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Proceedings Volume PC13119, Spintronics XVII; PC131191I (2024) https://doi.org/10.1117/12.3030958
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
Spin-torque manipulation of a spin system -- a key functionality of modern spintronics -- requires large spin current densities and therefore small device size. The development of antiferromagnetic spin-torque applications hinges upon reliable excitation and detection of coherent spin dynamics in a single antiferromagnetic nanodevice. It requires an electrical, magnetoresistive technique compatible with the device dimensions. Here, we develop a spin-torque antiferromagnetic resonance (ST-AFMR) experiment and study spin dynamics in an insulating antiferromagnetic crystal capped with a Platinum nanodevice. We observe antiferromagnetic magnons below and Goldstone excitations above the spin-flop field, from an area of only 200nm by 200nm -- a milestone for the development of antiferromagnetic spin-torque devices. By means of angle-dependent measurements, furthermore, we study the excitation and detection mechanisms and draw conclusions for antiferromagnet-based applications. This work was supported by the National Science Foundation through Grant No. ECCS-1810541.
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Igor Barsukov "Spin-torque antiferromagnetic resonance in a single nanoscale device", Proc. SPIE PC13119, Spintronics XVII, PC131191I (4 October 2024); https://doi.org/10.1117/12.3030958
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KEYWORDS
Nanostructures
Spin dynamics
Crystallography
Crystals
Magnons
Physical coherence
Platinum
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