Abstract The interplay between magnetism and superconductivity plays a crucial role in understanding unconventional superconductivity. Employing the proximity effect to realize superconductivity in ferromagnetic materials has generated widespread interest in achieving topological superconductivity and the novel Fulde−Ferrell−Larkin−Ovchinnikov state. Here, the proximity superconductivity is observed in a heterojunction of Fe 3 GeTe 2 (FGT)/NbSe 2 , in which FGT is a topological ferromagnetic material. The differential conductance of heterojunction shows three pairs of peaks, indicative of three superconducting phases (NbSe 2 , proximate NbSe 2 , and proximate FGT). The evolution of superconducting gaps adheres to Tinkham‐Klapwijk theory and the superconducting gap in proximate FGT is estimated as ≈0.52 meV. Additionally, a non‐reciprocal transport behavior is observed in the Josephson heterojunction of NbSe 2 /FGT/NbSe 2 . In this work, the interplay between ferromagnetism and superconductivity is explored systematically, providing a potential pathway for the realization of novel superconductivity.
Gao et al. (2025) studied this question.