title: Snell's Law for Spin Waves.
abstract: We report the experimental observation of Snell's law for magnetostatic spin waves in thin ferromagnetic Permalloy films by imaging incident, refracted, and reflected waves. We use a thickness step as the interface between two media with different dispersion relations. Since the dispersion relation for magnetostatic waves in thin ferromagnetic films is anisotropic, deviations from the isotropic Snell's law known in optics are observed for incidence angles larger than 25° with respect to the interface normal between the two magnetic media. Furthermore, we can show that the thickness step modifies the wavelength and the amplitude of the incident waves. Our findings open up a new way of spin wave steering for magnonic applications.
authors.affiliation: Department of Physics, Regensburg University, 93053 Regensburg, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Stigloher
authors.affiliation: Department of Physics, Regensburg University, 93053 Regensburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Decker
authors.affiliation: Department of Physics, Regensburg University, 93053 Regensburg, Germany.
authors.forename: H S
authors.initials: HS
authors.lastname: Körner
authors.affiliation: Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tanabe
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Moriyama
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Taniguchi
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hata
authors.affiliation: Dipartimento di Fisica e Geologia, Universita di Perugia, I-06123 Perugia, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Madami
authors.affiliation: Istituto Officina dei Materiali del Consiglio Nazionale delle Ricerche (IOM-CNR), Sede di Perugia, c/o Dipartimento di Fisica e Geologia, Via A. Pascoli, I-06123 Perugia, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gubbiotti
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kobayashi
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ono
authors.affiliation: Department of Physics, Regensburg University, 93053 Regensburg, Germany.
authors.forename: C H
authors.initials: CH
authors.lastname: Back