Publications by authors named "Daniel Yesudas"
Article Synopsis
- Laser-induced ultrafast demagnetization reveals limits of angular momentum dynamics in solids, but key aspects, particularly regarding electron-carried spin currents, remain debated.
- The study investigates the opposite phenomenon: ultrafast magnetization in FeRh, where laser pump pulses initiate angular momentum build-up instead of dissipation.
- Using time-resolved magneto-optical Kerr effect, researchers measure spin currents and find a strong correlation with magnetization dynamics, suggesting angular momentum transfer from electrons to magnons, followed by transport and dissipation to the lattice.
Domain walls in ferromagnetic nanowires are potential building-blocks of future technologies such as racetrack memories, in which data encoded in the domain walls are transported using spin-polarised currents. However, the development of energy-efficient devices has been hampered by the high current densities needed to initiate domain wall motion. We show here that a remarkable reduction in the critical current density can be achieved for in-plane magnetised coupled domain walls in CoFe/Ru/CoFe synthetic ferrimagnet tracks.
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