报告题目: |
Direct detection of pure AC spin-current by x-ray pump-probe measurements |
报告人: |
栗佳 研究员 |
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北京大学
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报告时间: |
2016-09-29 10:00 |
报告地点: |
理科楼三楼报告厅（C302） |
主办单位: |
物理系 |
简介: |
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.
Reference：
J. Li et al., Phys. Rev. Lett. 117, 076602 (2016)
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