Abstract
Despite recent progress in spin-current research, the detection of spin current has mostly remained indirect. By synchronizing a microwave waveform with synchrotron x-ray pulses, we use the ferromagnetic resonance of the Py () layer in a multilayer to pump a pure ac spin current into the and Co layers, and then directly probe the spin current within the layer and the spin dynamics of the Co layer by x-ray magnetic circular dichroism. This element-resolved pump-probe measurement unambiguously identifies the ac spin current in the layer.
- Received 30 November 2015
DOI:https://doi.org/10.1103/PhysRevLett.117.076602
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Watching Spin Currents
Published 11 August 2016
X-ray pulses have been used to directly observe the spin current flowing in a metal.
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