Metal K-edge XAS Study of AlB2-type Transition-metal Diborides

CHU Wang-Sheng; HU Tian-Dou; XIE Ya-Ning; LIU Wen-Han; WU Zi-Yu

Chinese Physics C> 2003, Vol. 27> Issue(S1) : 10-14

Metal K-edge XAS Study of AlB2-type Transition-metal Diborides

Institute of High Energy Physics,CAS,Beijing 100039,China2 Department of Physics,University of Science and Technology of China,Heifei 230026,China3 Universit di Roma ‘La Sapienza’,and Unita INFM,Piazzale Aldo Moro 2,00185 Roma Italy

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Abstract：
We have measured Metal K-edge X-ray absorption spectra (XAS) and X-ray diffraction (XRD) spectra of transition-metal diborides (TiB₂,VB₂ and CrB₂)We observed there are two weak pre-edge peak which may be separately due to hybridization between the 3d and 4p orbitals of the central metal atom and hybridization between the 3d orbitals of the cental metal atom and the coordinational metal atoms except two strong peaks in near-edge area.Moreover,we also simply fit the metal K-edge EXAFS spectra and got some structural parameters of the first and second shell of three transition metal absorption atoms.

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CHU Wang-Sheng, HU Tian-Dou, XIE Ya-Ning, LIU Wen-Han, WU Zi-Yu and Metal K-edge XAS Study of AlB2-type Transition-metal Diborides[J]. Chinese Physics C, 2003, 27(S1): 10-14.

CHU Wang-Sheng, HU Tian-Dou, XIE Ya-Ning, LIU Wen-Han, WU Zi-Yu and Metal K-edge XAS Study of AlB2-type Transition-metal Diborides[J]. Chinese Physics C, 2003, 27(S1): 10-14. shu

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Received: 2003-11-21
Revised: 1900-01-01

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