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Soft X-Ray Absorption Spectroscopy of the MgB2 Boron K Edge in an MgB2/Mg Composite



Daniel A. Fischer, A R. Moodenbaugh, Q Li, G Gu, Y Zhu, J W. Davenport, D O. Welch, H Su


Soft x-ray absorption (XAS), using fluorescence yield, was used to study the boron K near edge in MgB2 superconductor. The sample consists of MgB2 crystallites randomly oriented in a magnesium matrix. Abrasion of the sample surface in vacuum provides a surface relatively free of boron-containing impurities. The intrinsic boron K near edge spectrum of the sample at a temperature of 295 K is identified. This spectrum is then compared in detail with a spectrum calculated using the full potential linearized augmented plane wave method. Features predicted by the theory appear near the expected energies, with qualitative agreement regarding shape and intensity.
Modern Physics Letters B


high Tc, magnesium diboride, NEXAFS


Fischer, D. , Moodenbaugh, A. , Li, Q. , Gu, G. , Zhu, Y. , Davenport, J. , Welch, D. and Su, H. (2006), Soft X-Ray Absorption Spectroscopy of the MgB<sub>2</sub> Boron K Edge in an MgB<sub>2</sub>/Mg Composite, Modern Physics Letters B (Accessed June 22, 2024)


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Created June 8, 2006, Updated February 19, 2017