Optical detection of spin transport in non-magnetic metals

Details Optical detection of spin transport in non-magnetic metals Optical detection of spin transport in non-magnetic metals

2010-11-21

arxiv.org/abs/1011.4656v2

PRL 106, 226601 (2011)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.106.226601

We determine the dynamic magnetization induced in non-magnetic metal wedges composed of silver, copper and platinum by means of Brillouin light scattering (BLS) microscopy. The magnetization is transferred from a ferromagnetic Ni80Fe20 layer to the metal wedge via the spin pumping effect. The spin pumping efficiency can be controlled by adding an insulating but transparent interlayer between the magnetic and non-magnetic layer. By comparing the experimental results to a dynamical macroscopic spin-transport model we determine the transverse relaxation time of the pumped spin current which is much smaller than the longitudinal relaxation time.

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