Bulk-Sensitive X-Ray Absorption Spectroscopy Free of Self-Absorption

ORAL

Abstract

We demonstrate a new method to measure x-ray absorption spectroscopy (XAS) in addition to traditional transmission, total-electron yield (TEY) and total-fluorescence yield (TFY) that is bulk sensitive, like TFY, and is not affected by self-absorption corrections that plague TFY measurements. This measure of XAS is accomplished by measuring the x-ray emission (partial fluorescence yield, PFY) from a different element or excitation than the one probed by the incident photon energy. It is found that the reciprocal of such a PFY spectrum is proportional to the linear attenuation coefficient, offset by an energy independent constant. We demonstrate this technique on Cu L, La M and Nd M edges of the high-$T_C$ cuprate ${La_{2-x-y}Nd_ySr_xCuO_4}$ by comparing its TEY, TFY and PFY spectra.

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Authors

  • Andrew Achkar

    Department of Physics, University of Waterloo, Waterloo, N2L 3G1, Canada

  • Tom Regier

    Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0X4, Canada

  • Hiroki Wadati

    Department of Physics and Astronomy, University of British Columbia, Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada

  • George Sawatzky

    Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada

  • Young-June Kim

    Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada

  • David Hawthorn

    Department of Physics, University of Waterloo, Waterloo, N2L 3G1, Canada