Browsing by Subject Racah parameters

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  • Authors: Pratapkumar, C.; Prashantha, S.C.; Nagabhushana, H.; Jnaneshwara, D.M. (2018)

  • MgAl2O4:Cr Þ (0.01e0.11 mol) doped nanocrystalline powders were prepared by a combustion method at low temperature. The Scherer's method was used to estimate crystallite size and values were found to be in the range 20e30 nm and the same was confirmed by transmission electron microscopy (TEM) images. The energy band gap of the prepared samples was estimated from diffusion reflection spectra (DRS) and found to be 3.7e4.5 eV. The characteristic emission peaks recorded at 17123.3 cm 1 And 14727.5 cm 1 were attributed to the transitions 4 T2/4 A2and 2 E/4 A2respectively upon 357 nm excitation. The emission intensity increases up to 5 mol % Cr 3þ particles and then decreases, which may b...

Browsing by Subject Racah parameters

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 1 of 1
  • 1-s2.0-S2468217918301321-main.pdf.jpg
  • Article


  • Authors: Pratapkumar, C.; Prashantha, S.C.; Nagabhushana, H.; Jnaneshwara, D.M. (2018)

  • MgAl2O4:Cr Þ (0.01e0.11 mol) doped nanocrystalline powders were prepared by a combustion method at low temperature. The Scherer's method was used to estimate crystallite size and values were found to be in the range 20e30 nm and the same was confirmed by transmission electron microscopy (TEM) images. The energy band gap of the prepared samples was estimated from diffusion reflection spectra (DRS) and found to be 3.7e4.5 eV. The characteristic emission peaks recorded at 17123.3 cm 1 And 14727.5 cm 1 were attributed to the transitions 4 T2/4 A2and 2 E/4 A2respectively upon 357 nm excitation. The emission intensity increases up to 5 mol % Cr 3þ particles and then decreases, which may b...