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- W3116241785 abstract "We report on the consequences of non-uniform exchange in magnetic systems. The quantum mechanical exchange interaction between spins is responsible for the phenomenon of magnetic order, and is generally considered to be uniform across bulk magnetic systems. Partly inspired by the Dzyaloshinskii-Moriya interaction--also known as antisymmetric exchange--we use a linearly varying exchange interaction along a magnetic strip as a route to spatial inversion symmetry-breaking. We find that, in addition to asymmetric modes and localization, spatially-varying exchange can be used to design nonreciprocal magnetic signal excitation at frequencies that are tunable. Moreover, our work predicts nonreciprocity to occur across a vast range of frequencies up to hundreds of GHz. Such spin wave engineering is a key area of ongoing research in the fields of magnonics and spintronics, which are expected to enable the next generation of communication technology. Analogous nonreciprocity is expected to occur in other wave systems with gradient properties." @default.
- W3116241785 created "2021-01-05" @default.
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- W3116241785 date "2020-12-18" @default.
- W3116241785 modified "2023-09-27" @default.
- W3116241785 title "Breaking Spacial Inversion-Symmetry to Obtain Nonreciprocal Spin-Wave Excitation: The Case of Nonuniform Magnetic Exchange" @default.
- W3116241785 hasPublicationYear "2020" @default.
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