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We report unidirectional transmission of micron-wide spin waves beams in a 55 nm thin YIG. We downscaled a chiral coupling technique implementing Ni80Fe20 nanowires arrays with different widths and lattice spacing to study the non-reciprocal transmission of exchange spin waves down to lambda = 80 nm. A full spin wave spectroscopy analysis of these high wavevector coupled-modes shows some difficulties to characterize their propagation properties, due to both the non-monotonous field dependence of the coupling efficiency, and also the inhomogeneous stray field from the nanowires., submitted to AIP advances as MMM proceeding article

We investigate the Magnetocaloric Effect (MCE) of a quantum pseudodt taking into account the effect of spin orbit interaction (SOI). The entropy change and internal energy change been derived using the Tsallis formalism. we observed that the SOI effect and external parameters strongly affect the entropy change and internal energy change of a quantum speudodot. Knowin the magneto caloric effect being strongly related to the magnetic dipol, the effect of external magnetic field and the SOI considerably affect the entropy change as welle analytically than numerically. Also, it is found that the magneto caloric effect is sensitive to the extensivity parameter q.

We present a near-field diffraction model for spin waves in perpendicularly magnetized films applicable in any geometries of excitation fields. This model relies on Kalinikos-Slavin formalism to express the dynamic susceptibility tensor in k-space, and calculate the diffraction patterns via inverse 2D-Fourier transform of the response functions. We show an excellent quantitative agreement between our model and MuMax3 micro-magnetic simulations on two different geometries of antennas. Our method benchmarks spin wave diffraction in perpendicularly magnetized films, and is readily applicable for future designs of magnon beamforming and interferometric devices., Comment: submitted to Journal of Applied Physics