title: Polarizability and magnetoplasmonic properties of magnetic general nanoellipsoids.
abstract: An approach to compute the polarizability tensor of magnetic nanoparticles having general ellipsoidal shape is presented. We find a surprisingly excellent quantitative agreement between calculated and experimental magneto-optical spectra measured in the polar Kerr configuration from nickel nanodisks of large size (exceeding 100 nm) with circular and elliptical shape. In spite of its approximations and simplicity, the formalism presented here captures the essential physics of the interplay between magneto-optical activity and the plasmonic resonance of the individual particle. The results highlight the key role of the dynamic depolarization effects to account for the magneto-optical properties of plasmonic nanostructures.
authors.affiliation: Nanomagnetism Group, CIC nanoGUNE Consolider, 20018 Donostia-San Sebastián, Spain. n.maccaferri@nanogune.eu
authors.forename: Nicolò
authors.initials: N
authors.lastname: Maccaferri
authors.forename: Juan B
authors.initials: JB
authors.lastname: González-Díaz
authors.forename: Stefano
authors.initials: S
authors.lastname: Bonetti
authors.forename: Andreas
authors.initials: A
authors.lastname: Berger
authors.forename: Mikko
authors.initials: M
authors.lastname: Kataja
authors.forename: Sebastiaan
authors.initials: S
authors.lastname: van Dijken
authors.forename: Josep
authors.initials: J
authors.lastname: Nogués
authors.forename: Valentina
authors.initials: V
authors.lastname: Bonanni
authors.forename: Zhaleh
authors.initials: Z
authors.lastname: Pirzadeh
authors.forename: Alexandre
authors.initials: A
authors.lastname: Dmitriev
authors.forename: Johan
authors.initials: J
authors.lastname: Åkerman
authors.forename: Paolo
authors.initials: P
authors.lastname: Vavassori
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D060526:Magnetic Fields; D053768:Metal Nanoparticles / Q000737:chemistry*; D008956:Models, Chemical; D009532:Nickel / Q000737:chemistry*; D012031:Refractometry / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D009532:Nickel