Room-Temperature Deposition of δ‑Ni5Ga3 Thin Films and Nanoparticles via Magnetron Sputtering - Filippo Romeggio; Rasmus Bischoff; Clara B. Møller; Victor L. Jensen; Esteban Gioria; Rikke Egeberg Tankard; Rasmus S. Nielsen; Ole Hansen; Ib Chorkendorff; Jakob Kibsgaard; Christian D. Damsgaard (ACS Omega)