Resumen:
w plasmonic materials are required to enable potential strong coupling of light and mag- netism, which could lead to improved data storage and/or completely novel optical materials [1, 2]. Bimetallic materials are a promising new way to realize new and/or better plasmonic behaviors [3, 4]. In this paper we first use high-resolution transmission electron microscopy to present evidence for ferroplasmons, strong surface plasmons that appear in ferromagnetic metals when in the proximity of noble metal nanostructures