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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

  • 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.

  • References

    [1] Gordon W,Soffer S B. J. Phys. Chem. Solids, 1975,36: 6272 Nagamatsu J,Nakagawa N et al. Nature, 2001, 410: 633 LIU S H,Kopp L et al. Phys. Rev. B, 1975, 11: 34654 lhara H, Hirahayashi M, Nakagawa H. Phys. Rev. B, 1977, 16:7265 Vajeeston P et al. Phys. Rev. B, 2001 , 63 : 0451156 WANG X B, TTAN D C, WANG L. J. Phys. : Condens. Matter,1994, 6: 101857 AN L M,Pickett W E. Phys. Rev. T.ett. 2001 -86: 43668 Haas S , Maki K. Phys. Rev. B, 2002, 65 : R205029 Hirsch J E , Marsiglio F. Phys. Rev. B, 2001 , 64 : 14452310 Profeta G et al. Phys. Rev. B, 2001 , 65: 05450211 McMillan W L. Phys. Rev. ,1968, 167: 33112 Ankudinov A L. J. Synchrotron Rad. ,1999, 6: 23613 Binsled N el al. J. Synchrolron Rad. ,1999,6: 23914 Delphine Caharel el al. J. Synchrolron Rad. ,1999, 6 : 25815 Schaich W L. Phys. Rev. B , 1984, 29 : 651316 Benfatto M, Naloli C R. Phys. Rev. B , 1986, 34 : 577417 WU Zi-Yu el al. J. Phys. : Condens. Maller, 2000, 12: 697118 QIN M J , WANG X L, Sollain S el al. Phys. Rev. B, 2001, 64:060505 ( R)19 WU Z Y, Jollel F , Caulier-Soyer M. J. Phys. : Condens. Matter,1999,11: 7185

  • References

    [1] Gordon W,Soffer S B. J. Phys. Chem. Solids, 1975,36: 6272 Nagamatsu J,Nakagawa N et al. Nature, 2001, 410: 633 LIU S H,Kopp L et al. Phys. Rev. B, 1975, 11: 34654 lhara H, Hirahayashi M, Nakagawa H. Phys. Rev. B, 1977, 16:7265 Vajeeston P et al. Phys. Rev. B, 2001 , 63 : 0451156 WANG X B, TTAN D C, WANG L. J. Phys. : Condens. Matter,1994, 6: 101857 AN L M,Pickett W E. Phys. Rev. T.ett. 2001 -86: 43668 Haas S , Maki K. Phys. Rev. B, 2002, 65 : R205029 Hirsch J E , Marsiglio F. Phys. Rev. B, 2001 , 64 : 14452310 Profeta G et al. Phys. Rev. B, 2001 , 65: 05450211 McMillan W L. Phys. Rev. ,1968, 167: 33112 Ankudinov A L. J. Synchrotron Rad. ,1999, 6: 23613 Binsled N el al. J. Synchrolron Rad. ,1999,6: 23914 Delphine Caharel el al. J. Synchrolron Rad. ,1999, 6 : 25815 Schaich W L. Phys. Rev. B , 1984, 29 : 651316 Benfatto M, Naloli C R. Phys. Rev. B , 1986, 34 : 577417 WU Zi-Yu el al. J. Phys. : Condens. Maller, 2000, 12: 697118 QIN M J , WANG X L, Sollain S el al. Phys. Rev. B, 2001, 64:060505 ( R)19 WU Z Y, Jollel F , Caulier-Soyer M. J. Phys. : Condens. Matter,1999,11: 7185

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

    Corresponding author: ,
  • 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
  • Received Date: 2003-11-21
  • Accepted Date: 1900-01-01
  • Available Online: 2003-01-02

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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