We found by micromagnetic simulations that the motion of a transverse wall (TW) type domain wall in magnetic thin-film nanostripes can be manipulated via interaction with spin waves (SWs) propagating through the TW. The velocity of the TW motion can be controlled by changes of the frequency and amplitude of the propagating SWs. Moreover, the TW motion is efficiently driven by specific SW frequencies that coincide with the resonant frequencies of the local modes existing inside the TW structure. The use of propagating SWs, whose frequencies are tuned to those of the intrinsic TW modes, is an alternative approach for controlling TW motion in nanostripes.

Transmission of microwave spin waves through a microstructured magnonic crystal in the form of a permalloy waveguide of a periodically varying width was studied experimentally and theoretically. The spin wave characteristics were measured by spatially-resolved Brillouin light scattering microscopy. A rejection frequency band was clearly observed. The band gap frequency was controlled by the applied magnetic field. The measured spin-wave intensity as a function of frequency and propagation distance is in good agreement with a model calculation.Comment: 4 pages, 3 figure

We report on the influence of the improved L2 1 ordering degree on the magnetic properties of Co 2 MnSi Heusler films. Different fractions of the L2 1 phase are obtained by different post-growth annealing temperatures ranging from 350 • C to 500 • C. Room temperature magneto-optical Kerr effect measurements reveal an increase of the coercivity at an intermediate annealing temperature of 425 • C, which is a fingerprint of an increased number of pinning centers at this temperature.Furthermore, Brillouin light scattering studies show that the improvement of the L2 1 order in the Co 2 MnSi films is correlated with a decrease of the saturation magnetization by about 9 %. The exchange stiffness constant of Co 2 MnSi, however, increases by about 8 % when the L2 1 order is improved. Moreover, we observe a drop of the cubic anisotropy constant K 1 by a factor of 10 for an increasing amount of the L2 1 phase.

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