title: Top-down design of magnonic crystals from bottom-up magnetic nanoparticles through protein arrays.
abstract: We show that chemical fixation enables top-down micro-machining of large periodic 3D arrays of protein-encapsulated magnetic nanoparticles (NPs) without loss of order. We machined 3D micro-cubes containing a superlattice of NPs by means of focused ion beam etching, integrated an individual micro-cube to a thin-film coplanar waveguide and measured the resonant microwave response. Our work represents a major step towards well-defined magnonic metamaterials created from the self-assembly of magnetic nanoparticles.
authors.affiliation: University of Bristol, H. H. Wills Physics Laboratory, School of Physics, Tyndall Avenue, Bristol BS8 1TL, United Kingdom. CIC nanoGUNE consolider, Avenida Tolosa 76, E-20018, Donostita-San Sebastian, Spain. Ikerbasque, Basque Foundation for Science, María Díaz de Haro 3, 6ª planta, E-48013 Bilbao, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Okuda
authors.forename: T
authors.initials: T
authors.lastname: Schwarze
authors.forename: J-C
authors.initials: JC
authors.lastname: Eloi
authors.forename: S E
authors.initials: SE
authors.lastname: Ward Jones
authors.forename: P J
authors.initials: PJ
authors.lastname: Heard
authors.forename: A
authors.initials: A
authors.lastname: Sarua
authors.forename: E
authors.initials: E
authors.lastname: Ahmad
authors.forename: V V
authors.initials: VV
authors.lastname: Kruglyak
authors.forename: D
authors.initials: D
authors.lastname: Grundler
authors.forename: W
authors.initials: W
authors.lastname: Schwarzacher
mesh_terms: D003460:Crystallization; D005293:Ferritins / Q000737:chemistry; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D040081:Protein Array Analysis / Q000379:methods*
chemical_list: D058185:Magnetite Nanoparticles; D005293:Ferritins