2020/12/10 by Kewen Shi, Shi, Kewen, Wenlong Cai +24 · 1 citation
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #Condensed matter physics #FOS: Physical sciences #Ferromagnetic resonance #Ferromagnetism #Magnetic field #Magnetic properties of thin films #Magnetization #Materials science #Microwave #Molecular Junctions and Nanostructures #Nucleation #Perpendicular #Physics #Physics of Superconductivity and Magnetism #Tunnel magnetoresistance #physics.app-ph
paper · pdf · doi:10.48550/arxiv.2012.05596
published in arXiv (Cornell University) (Cornell University)
arxiv created 2020/12/10 · openalex publication_date 2020/12/10 · arxiv updated 2020/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Magnetic droplets, a class of highly non-linear magnetodynamical solitons, can be nucleated and stabilized in nanocontact spin-torque nano-oscillators where they greatly increase the microwave output power. Here, we experimentally demonstrate magnetic droplets in magnetic tunnel junctions (MTJs). The droplet nucleation is accompanied by a power increase of over 300 times compared to its ferromagnetic resonance modes. The nucleation and stabilization of droplets are ascribed to the double-CoFeB free layer structure in the all-perpendicular MTJ which provides a low Zhang-Li torque and a high pinning field. Our results enable better electrical sensitivity in the fundamental studies of droplets and show that the droplets can be utilized in MTJ-based applications.