Work

Pure Inverse Spin Hall Effect in Ferromagnetic Ni 80 Fe 20 /Y 3 Fe 5 O 12 (YIG) Heterostructures via the Longitudinal Spin Seebeck Effect

Year: 2026

Type: article

Abstract: ABSTRACT Spin–charge interconversion in ferromagnetic metals provides an unconventional pathway to explore spin–orbit coupling beyond heavy nonmagnetic systems. While ferromagnetic Ni 80 Fe 20 has long been regarded as a spin source, its role as a spin‐current detector remains largely unexplored. Here, we demonstrate the direct detection of a pure inverse spin Hall effect (ISHE) in a Ni 80 Fe 20 layer interfaced with a ferrimagnetic insulator, yttrium iron garnet (Y 3 Fe 5 O 12 , YIG). A thermally generated spin current produced by the longitudinal spin Seebeck effect (LSSE) in YIG is converted into a transverse charge voltage within the Ni 80 Fe 20 layer. Importantly, systematic control experiments using Ni 80 Fe 20 /Al 2 O 3 bilayers, combined with symmetry‐controlled measurement geometries, quantitatively eliminate anomalous Nernst contributions, thereby establishing that the observed voltage originates intrinsically from the ISHE in ferromagnetic Ni 80 Fe 20 . These findings identify ferromagnetic metals as viable spin‐current detectors and provide a conceptually simple platform for investigating spin–orbit interactions and spin caloritronic phenomena without relying on heavy nonmagnetic metals.

Source: Advanced Physics Research

DOI: 10.1002/apxr.70156