Effect of Meissner screening and trapped magnetic flux on magnetization dynamics in thick Nb/Ni80Fe20/Nb trilayers

Abstract

We investigate the influence of Meissner screening and trapped magnetic flux on magnetization dynamics for a Ni80Fe20 film sandwiched between two thick Nb layers (100 nm) using broadband (5-20 GHz) ferromagnetic resonance (FMR) spectroscopy. Below the superconducting transition Tc of Nb, significant zero-frequency line broadening (5-6 mT) and DC resonance field shift (50 mT) to a low field are both observed if the Nb thickness is comparable to the London penetration depth of Nb films (>= 100 nm). We attribute the observed peculiar behaviors to the increased incoherent precession near the Ni80Fe20/Nb interface and the effectively focused magnetic flux in the middle Ni80Fe20 caused by strong Meissner screening and (defect-)trapped flux of the thick adjacent Nb layers. This explanation is supported by static magnetic properties of the samples and comparison with FMR data on thick Nb/Ni80Fe20 bilayers. Great care should therefore be taken in the analysis of FMR response in ferromagnetic Josephson structures with thick superconductors, a fundamental property for high-frequency device applications of spin-polarized supercurrents.

arXiv comment23 pages, 5 figures

References in corpus (16)

• Proximity effects in superconductor-ferromagnet heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Superconducting Spintronics
• Spin-polarized supercurrents for spintronics: a review of current progress
• Observation of spin-triplet superconductivity in Co-based Josephson Junctions
• Spin Torques in Ferromagnetic/Normal Metal Structures
• Long range triplet Josephson effect through a ferromagnetic trilayer
• Precise determination of the spectroscopic g-factor using broadband ferromagnetic resonance spectroscopy
• Spin dynamics in a superconductor / ferromagnet proximity system
• Ferromagnetic Josephson junction with precessing magnetization
• Current-Induced Effective Magnetic Fields in Co/Cu/Co Nanopillars
• Possible evidence for spin-transfer torque induced by spin-triplet supercurrent
• Tuning odd triplet superconductivity by spin pumping
• Proximity effect-assisted absorption of spin currents in superconductors
• 0-pi oscillations in nanostructured Nb/Fe/Nb Josephson junctions
• Long-range proximity effect in Nb-based heterostructures induced by a magnetically inhomogeneous permalloy layer

Cited by in corpus (33)

• An Introduction to Spin Wave Computing
• Ultra-strong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers
• Magnetization dynamics in proximity-coupled superconductor/ferromagnet/superconductor multilayers
• Boosting spintronics with superconductivity
• Magnetoelectric effects in Josephson junctions
• Finite-frequency spin susceptibility and spin pumping in superconductors with spin-orbit relaxation
• Abrikosov vortex nucleation and its detrimental effect on superconducting spin pumping in Pt/Nb/Ni80Fe20/Nb/Pt proximity structures
• Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures
• Large enhancement of spin pumping due to the surface bound states in normal metal/superconductor structures
• Magnon spin current induced by triplet Cooper pair supercurrents
• Magnetization dynamics in proximity-coupled superconductor-ferromagnet-superconductor multilayers. Part II
• Odd triplet superconductivity induced by the moving condensate
• Ultrastrong magnon-photon coupling and entanglement in superconductor/ferromagnet nanostructures
• Inverse magnetic hysteresis of the Josephson supercurrent: study of the magnetic properties of thin niobium/permalloy (Fe_{20}Ni_{80}) interfaces
• Anisotropic superconducting spin transport at magnetic interfaces
• Giant demagnetization effects induced by superconducting films
• Ferromagnetic resonance modulation in $d$-wave superconductor/ferromagnetic insulator bilayer systems
• Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
• Interplay of magnetization dynamics with microwave waveguide at cryogenic temperatures
• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Spin pumping in d-wave superconductor/ferromagnet hybrids
• Non-linear spin torque, pumping and cooling in superconductor/ferromagnet systems
• Buzdin, Shapiro and Chimera Steps in ${\phi }_0$ Josephson Junctions
• Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
• Collective magnetic and plasma excitations in Josephson $\psi$ junctions
• Magnon influence on the superconducting density of states in superconductor$-$ferromagnetic-insulator bilayers
• Antiferromagnetic resonances in superconductor-ferromagnet multilayers
• Buzdin, Shapiro and Chimera Steps in ${\phi }_0$ Josephson Junctions. II. Bifurcation, Switching, and Hysteresis
• Anisotropic spin-current spectroscopy of ferromagnetic superconducting gap symmetries
• Ultra-strong coupling of two ferromagnets via Meissner currents
• Growth optimization of TaN for superconducting spintronics
• Originality of resonance and locking phenomena in SFS ${\phi }_0$ Josephson junction
• Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions