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Dinsdag 2 mei 2017
Prof.dr. B. Koopmans (Department of Applied Physics, Eindhoven University of Technology)
Spinnende Elektronen – Spannende Elektronica!
Spintronics provides exciting routes towards advanced nano-electronic devices in which not only the electron charge but also its quantum mechanical spin is being exploited. In my lecture, I will introduce a number of fascinating developments in this field. All of them are based on seemingly subtle effects, which nevertheless turn out to be highly relevant for future devices. As an example, the so-called spin Hall effect describes how –mediated by relativistic spin-orbit coupling– spin up and spin down electrons are deflected oppositely when driven by a current, analogous to the curved trajectory of a spinning soccer ball. As another example, it has been shown that the magnetic orientation of a thin ferromagnetic film can be switched by a single femtosecond laser pulse using a subtle interplay by laser heating and interatomic exchange interactions. The underlying physics will be discussed in the context of novel device architectures, such a magnetic random access memories, the visionary magnetic racetrack memory, and possibly hybrid magneto-photonic memories.
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