From Event: SPIE Optical Engineering + Applications, 2017
The magnetic field associated with a picosecond intense electron pulse is shown to switch locally the magnetization of extended films and nanostructures and to ignite locally spin waves excitations. Also topologically protected magnetic textures such as skyrmions can be imprinted swiftly in a sample with a residual Dzyaloshinskii-Moriya spin-orbital coupling. Characteristics of the created excitations such as the topological charge or the width of the magnon spectrum can be steered via the duration and the strength of the electron pulses. The study points to a possible way for a spatiotemporally controlled generation of magnetic and skyrmionic excitations.
A. F. Schäffer, H. A. Dürr, and J. Berakdar, "Ultrafast nanoscale magnetic switching via intense picosecond electron bunches," Proc. SPIE 10380, Ultrafast Nonlinear Imaging and Spectroscopy V, 103800G (Presented at SPIE Optical Engineering + Applications: August 06, 2017; Published: 7 September 2017); https://doi.org/10.1117/12.2274087.
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