2019/06/27 by D. M. Polishchuk, Polishchuk, Dmytro M., T. I. Polek +9
Engineering · Materials Science · Physics and Astronomy · #Copper Interconnects and Reliability #FOS: Physical sciences #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Metal and Thin Film Mechanics
paper · pdf · doi:10.48550/arxiv.1906.11688
openalex publication_date 2019/06/27 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Ferromagnetic resonance (FMR) in exchange-coupled ferromagnet-antiferromagnet\n(FM/AFM) bilayers commonly shows a moderate increase in the resonance frequency\nowing to the induced unidirectional anisotropy. Here we report a large FMR\nfrequency enhancement toward the sub-THz range observed in Py/FeMn with\nultrathin AFM FeMn. The effect is connected with a sizable induced magnetic\nmoment in FeMn caused by the magnetic proximity effect from the Py layer. The\nobserved FMR properties are explained as due to the competing intrinsic\nantiferromagnetic order and the ferromagnetic proximity effect in nanometer\nthin FeMn. Our results show that combining materials with strong and weak\nanti/ferromagnetic ordering can potentially close the notoriously difficult\nGHz-THz gap important for high-speed spintronic applications.\n