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Wed, 01 Jan 1997 00:00:00 +0100Wed, 01 Jan 1997 00:00:00 +0100Absence of elastic anomalies for Co/ Ni superlattices with oscillatory transport
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/915
We report on Brillouin light scattering investigations of the elastic properties in Co/Ni superlattices which exhibit localized electronic eigenstates near the Fermi level causing an oscillation of the resistivity as a function of the superlattice periodicity A. No oscillations of the Rayleigh and Sezawa mode as a function of A could be observed within an error margin of +- 2% indicating that the localized electronic states do not contribute to the elastic constants.Christoph Mathieu; Burkard Hillebrands; C. Hartmann; Sihong Kim; Ivan Schullerarticlehttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/915Wed, 01 Jan 1997 00:00:00 +0100Anisotropic magnetic coupling of permalloy micron dots forming a square lattice
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/926
Static magnetic and spin wave properties of square lattices of permalloy micron dots with thicknesses of 500 Å and 1000 Å and with varying dot separations have been investigated. A magnetic fourfold anisotropy was found for the lattice with dot diameters of 1 micrometer and a dot separation of 0.1 micrometer. The anisotropy is attributed to an anisotropic dipole-dipole interaction between magnetically unsaturated parts of the dots. The anisotropy strength (order of 100000 erg/cm^3 ) decreases with increasing in-plane applied magnetic field.Christoph Mathieu; Martin Bauer; Oliver Büttner; Steffen Riedling; Björn Roos; Serguei Demokritov; Burkard Hillebrands; C. Hartmann; B. Bartenlian; C. Chappert; D. Decanini; F. Rousseaux; E. Cambril; A. Müller; B. Hoffmann; U. Hartmannarticlehttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/926Wed, 01 Jan 1997 00:00:00 +0100Static and dynamic properties of patterned magnetic permalloy films
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/930
Static magnetic and spin wave properties of square lattices of permalloy micron dots with thicknesses of 500 Å and 1000 Å and with varying dot separations have been investigated. The spin wave frequencies can be well described taking into account the demagnetization factor of each single dot. A magnetic four-fold anisotropy was found for the lattice with dot diameters of 1 micrometer and a dot separation of 0.1 micrometer. The anisotropy is attributed to an anisotropic dipole-dipole interaction between magnetically unsaturated parts of the dots. The anisotropy strength (order of 100000 erg/cm^3 ) decreases with increasing in-plane applied magnetic field.Burkard Hillebrands; Christoph Mathieu; C. Hartmann; Martin Bauer; Oliver Büttner; Steffen Riedling; Björn Roos; Serguei Demokritov; B. Bartenlian; C. Chappert; D. Decanini; F. Rousseaux; E. Cambril; A. Müller; B. Hoffmann; U. Hartmannarticlehttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/930Wed, 01 Jan 1997 00:00:00 +0100