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Spin wave turns
Dočkalová, Lucie ; Gablech, Imrich (oponent) ; Urbánek, Michal (vedoucí práce)
In today's world of modern technology, there is considerable pressure to develop increasingly powerful electronic devices. These devices operate on the basis of integrated circuits, where the smallest components currently reach a size in the order of nanometers. Their further technological development connected with the trend of miniaturization encounters the limits resulting from the quantum character of electrons. Magnonics, as a new field of modern physics, offers a solution to this obstacle. Unlike electronic devices, magnonic devices process data using magnons, quasi-particles of spin waves. Although some magnonic devices have already been introduced, connecting them on a small chip is very complicated. Highly anisotropic dispersion relationships of spin waves prevent the efficient transmission of magnons through so-called waveguides. In this work, we deal with a way to overcome this anisotropy and thus allow the propagation of spin waves in any direction with the same efficiency. For this purpose, we use corrugated waveguides in the shape of bends, which we produce using a combination of electron lithography and deposition induced by a focused electron beam. The ripple of the prepared waveguides is characterized using an atomic force microscope. Subsequently, we examine the magnetic state of the structures using Kerr microscopy. Finally, we focus on the propagation of spin waves through the curves produced, which we measure using Brillouin light scattering spectroscopy.
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Spin wave turns
Dočkalová, Lucie ; Gablech, Imrich (oponent) ; Urbánek, Michal (vedoucí práce)
In today's world of modern technology, there is considerable pressure to develop increasingly powerful electronic devices. These devices operate on the basis of integrated circuits, where the smallest components currently reach a size in the order of nanometers. Their further technological development connected with the trend of miniaturization encounters the limits resulting from the quantum character of electrons. Magnonics, as a new field of modern physics, offers a solution to this obstacle. Unlike electronic devices, magnonic devices process data using magnons, quasi-particles of spin waves. Although some magnonic devices have already been introduced, connecting them on a small chip is very complicated. Highly anisotropic dispersion relationships of spin waves prevent the efficient transmission of magnons through so-called waveguides. In this work, we deal with a way to overcome this anisotropy and thus allow the propagation of spin waves in any direction with the same efficiency. For this purpose, we use corrugated waveguides in the shape of bends, which we produce using a combination of electron lithography and deposition induced by a focused electron beam. The ripple of the prepared waveguides is characterized using an atomic force microscope. Subsequently, we examine the magnetic state of the structures using Kerr microscopy. Finally, we focus on the propagation of spin waves through the curves produced, which we measure using Brillouin light scattering spectroscopy.
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