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Comparison of time-resolved x-ray magnetic circular dichroism measurements in reflection and transmission for layer-specific precessional dynamics measurements

Journal of Applied Physics, ISSN: 0021-8979, Vol: 99, Issue: 8
2006
  • 22
    Citations
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  • 16
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Metrics Details

  • Citations
    22
    • Citation Indexes
      22
  • Captures
    16

Article Description

We present experimental techniques to measure magnetization precession of individual layers in a "spin-valve" trilayer. Precessional motions of individual Ni81 Fe19 and Co93 Zr7 layers have been separated in Ni81 Fe19 Cu Co93 Zr7 using ±45 ps time-resolved x-ray magnetic circular dichroism (tr-XMCD) at Fe and Co edges. We compare the efficacy of two experimental configurations in this paper. Pulsed-field tr-XMCD measurements in reflectivity are compared with resonant-field tr-XMCD measurements in transmission. Despite the order of magnitude larger angles of precession excited in pulsed-field reflectivity measurements, data quality is found to be superior in resonant-field transmission measurements. Relative roles of sample preparation and timing jitter in the different techniques are discussed. © 2006 American Institute of Physics.

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