Direct detection of pure AC spin-current by x-ray pump-probe measurements
J. Li; Shelford; P. Shafer; et al.A. Tan; J. X. Deng; P. S. Keatley; C. Hwang; E. Arenholz; G. van der Laan; Hicken, RJ; Z. Q. Qiu
Date: 11 August 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Publisher DOI
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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 (Ni81Fe19) layer in a Py/Cu/Cu75Mn25/Cu/Co multilayer to pump a pure AC spin current into the Cu75Mn25 and Co ...
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 (Ni81Fe19) layer in a Py/Cu/Cu75Mn25/Cu/Co multilayer to pump a pure AC spin current into the Cu75Mn25 and Co layers, and then directly probe the spin current within the Cu75Mn25 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 Cu75Mn25 layer.
Physics and Astronomy
Faculty of Environment, Science and Economy
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