Spin-Pumping-Induced Inverse Spin Hall Effect in Nb/Ni80Fe20 Bilayers and its Strong Decay Across the Superconducting Transition Temperature
Kun-Rok Jeon, Chiara Ciccarelli, Hidekazu Kurebayashi, Jöerg Wunderlich, Lesley F. Cohen, Sachio Komori, Jason W. A. Robinson, Mark G. Blamire
DOI 10.1103/PhysRevApplied.10.014029 · Physical Review Applied
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We quantify the spin Hall angle θSH and spin-diffusion length lsd of Nb from inverse spin Hall effect (ISHE) measurements in Nb/Ni80Fe20 bilayers under ferromagnetic resonance. By varying the Nb thickness tNb and comparing to a Ni80Fe20/Pt reference sample, room temperature values of θSH and lsd for Nb are estimated to be approximately −0.001 and 30 nm, respectively. We also investigate the ISHE as a function of temperature T for different tNb. Above the superconducting transition temperature Tc of Nb , a clear tNb-dependent T evolution of the ISHE is observed whereas below Tc, the ISHE voltage drops rapidly and is below the sensitivity of our measurement setup at a lower T. This suggests the strong decay of the quasiparticle (QP) charge-imbalance relaxation length across Tc, as supported by an additional investigation of the ISHE in a different sample geometry along with model calculation. Our finding suggests careful consideration should be made when developing superconductor spin Hall devices that intend to utilize QP-mediated spin-to-charge interconversion.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Temperature-Dependent Spin Transport and Current-Induced Torques in Superconductor-Ferromagnet Heterostructures
similarity 0.92M. Müller et al.
Source status unknown — claims are unverified
Observation of the dominant spin-triplet supercurrent in Josephson spin valves with strong Ni ferromagnets
similarity 0.91O. M. Kapran et al.
Source status unknown — claims are unverified
Effect of Meissner Screening and Trapped Magnetic Flux on Magnetization Dynamics in Thick Nb/Ni80Fe20/Nb Trilayers
similarity 0.91Kun-Rok Jeon et al.
Source status unknown — claims are unverified
Enhanced Supercurrents in Josephson Junctions Containing Nonparallel Ferromagnetic Domains
similarity 0.90J. W. A. Robinson et al.
Source status unknown — claims are unverified
Photon-assisted Phase Slips in Superconducting Nanowires
similarity 0.90Biao Zhang et al.
Source status unknown — claims are unverified
Controllable generation of a spin-triplet supercurrent in a Josephson spin valve
similarity 0.90Adrian Iovan et al.
Source status unknown — claims are unverified