X-Ray Absorption Spectroscopy and X-Ray Magnetic Circular Dichroism Studies of Transition-Metal-Codoped ZnO Nano-Particles

  title={X-Ray Absorption Spectroscopy and X-Ray Magnetic Circular Dichroism Studies of Transition-Metal-Codoped ZnO Nano-Particles},
  author={Takashi Kataoka and Yasunori Yamazaki and V. R. Singh and Yu Sakamoto and Keisuke Ishigami and Virendra Kumar Verma and Atsushi Fujimori and F. H. Chang and H.J. Lin and D J Huang and C. T. Chen and Daisuke Asakura and Tsuneharu Koide and Atsushi Tanaka and Debjani Karmakar and Suman Mandal and Triloki Nath and I. Dagupta},
  journal={E-journal of Surface Science and Nanotechnology},
We report on x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) studies of the paramagnetic (Mn,Co)-co-doped ZnO and ferromagnetic (Fe,Co)-co-doped ZnO nano-particles. Both the surface-sensitive total-electron-yield mode and the bulk-sensitive total-fluorescence-yield mode have been employed to extract the valence and spin states of the surface and inner core regions of the nano-particles. XAS spectra reveal that significant part of the doped Mn and Co atoms are… 
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Debjani Karmakar,1 S. K. Mandal,2 R. M. Kadam,3 P. L. Paulose,4 A. K. Rajarajan,5 T. K. Nath,2 A. K. Das,2 I. Dasgupta,6 and G. P. Das7 1Technical Physics & Prototype Engineering Division, Bhabha
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  • M. Kadam , S. K. Mandal, R. Adhikari, A. K. Das, T. K. Nath, N. Ganguli, I. Dasgupta, and G. P. Das, Phys. Rev. B 81, 184421
  • 2010
  • 107 033718
  • 2010