Materials Transactions Online

Materials Transactions, Vol.48 No.09 (2007) pp.2358-2361
© 2007 The Japan Institute of Metals

Local Structure around Pd Atoms in Pd42.5Ni7.5Cu30P20 Excellent Glass-Former Studied by Anomalous X-ray Scattering

Shinya Hosokawa1,2, Jean-François Bérar3, Nathalie Boudet3, Tetsu Ichitsubo4, Eiichiro Matsubara4 and Nobuyuki Nishiyama5

1Institut für Physikalische-, Kern-, und Makromolekulare Chemie, Philipps Universität Marburg, D-35032 Marburg, Germany
2Center for Materials Research using Third-Generation Synchrotron Radiation Facilities, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan
3Institut Néel, CNRS, F-38042 Grenoble Cedex 09, France
4Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
5R&D Institute of Metals and Composites for Future Industries (RIMCOF), Sendai 980-8577, Japan

In order to study local structure around the Pd atoms in Pd42.5Ni7.5Cu30P20 excellent metallic glass-former, an anomalous X-ray scattering (AXS) experiment was performed at energies close to the Pd K absorption edge at the beamline BM02 of the European Synchrotron Radiation Facility. The differential structure factor, ΔPdS(Q), was obtained with a good statistical quality, which demonstrates that a pre-shoulder at about 20 nm-1, indicating the existence of an intermediate-range order, originates from the Pd-Pd atomic correlation. The first peak in the differential pair correlation function, ΔPdg(r), shows a longer inter-atomic length around the Pd atoms than the average value. The local structure around the Pd atoms is discussed in detail by comparing to the previous experiments of AXS and electronic structure.

(Received 2007/4/23; Accepted 2007/6/7; Published 2007/8/10)

Keywords: bulk metallic glass, local structure, glass forming ability, anomalous X-ray scattering

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