Pico - Nano - Mikro: Going small, fast and dilute with soft x-rays

Monday, April 25, 2016 - 11:18am

Speaker: Hendrik Ohldag (Stanford University)

Program Description

Because of the wavelength of x-rays, microscopes at synchrotrons are great tools to learn about physics on the nanoscale. In addition, one can make use of the fact that synchrotrons produce short x-ray pulses and address dynamical processes with a few tens of picosecond temporal resolution. At SSRL we developed a dedicated microscopy setup that allows us to study small changes in the magnetization (~1-10 ppm) with 30 nm spatial and about 20 ps temporal resolution. Using this microscope we were able, for the first time, to observe the injection of a spin polarized current from a ferromagnet into a non-magnetic metal. Other examples that will be discussed in this talk are the evolution of spin waves from nano contact or the behavior of different materials in a microwave cavity in ferromagnetic resonance on the nanoscale.

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