Phys.org  August 16, 2023 Spin waves are ideal candidates for wave-based computing, but the construction of magnetic circuits is blocked by the lack of an efficient mechanism to excite long-running exchange spin waves with normalized amplitudes. An international team of researchers (Austria, Ukraine, Germany, Czech Republic) solved the problem by exploiting a deeply nonlinear phenomenon for forward volume spin waves in 200-nm-wide nanoscale waveguides and validated their concept using microfocused Brillouin light scattering spectroscopy. An unprecedented nonlinear frequency shift of more than 2 GHz was achieved, corresponding to a magnetization precession angle of 55° and enabled the excitation of spin […]