Proximity-induced density-of-states oscillations in a superconductor/strong-ferromagnet system

Abstract

We have measured the evolution of the tunneling density of states (DOS) in superconductor/ferromagnet (S/F) bilayers with increasing F-layer thickness, where F in our experiment is the strong ferromagnet Ni. As a function of increasing Ni thickness, we detect multiple oscillations in the DOS at the Fermi energy from differential conductance measurements. The features in the DOS associated with the proximity effect change from normal to inverted twice as the Ni thickness increases from 1 to 5 nm.

4 pages, 4 figures

References in corpus (4)

• Critical Current Oscillations in Strong Ferromagnetic Pi-Junctions
• High quality ferromagnetic 0 and pi Josephson tunnel junctions
• Anomalous double peak structure in Nb/Ni superconductor/ferromagnet tunneling DOS
• Spectroscopy and critical temperature of diffusive superconducting/ferromagnetic hybrid structures with spin-active interfaces

Cited by in corpus (15)

• Theory of the spin-galvanic effect and the anomalous phase-shift ${\phi }_0$ in superconductors and Josephson junctions with intrinsic spin-orbit coupling
• Signature of magnetic-dependent gapless odd frequency states at superconductor/ferromagnet interfaces
• Intrinsic Paramagnetic Meissner Effect due to s-wave Odd-Frequency Superconductivity
• Odd-frequency superconducting states with different types of Meissner response: Problem of coexistence
• Zero Energy Peak and Triplet Correlations in Nanoscale SFF Spin-Valves
• Spontaneous Edge Accumulation of Spin Currents in Finite-Size Two-Dimensional Diffusive Spin-Orbit Coupled SFS Heterostructures
• Magnetization-control and transfer of spin-polarized Cooper pairs into a half-metal manganite
• Long-Range Spin-Triplet Correlations and Edge Spin Currents in Diffusive Spin-Orbit Coupled SNS Hybrids with a Single Spin-Active Interface
• In-gap features in superconducting LaAlO${}_3$-SrTiO${}_3$ interfaces observed by tunneling spectroscopy
• Area-dependence of spin-triplet supercurrent in ferromagnetic Josephson junctions
• Robustness of Spin-Triplet Pairing and Singlet-Triplet Pairing Crossover in Superconductor/Ferromagnet Hybrids
• Crossover between short and long range proximity effects in SFS junctions with Ni-based ferromagnets
• Local characterization of ferromagnetic properties in ferromagnet/superconductor bilayer by Point Contact Andreev Reflection Spectroscopy
• Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids
• Dissipation in quantum tunnel junctions