• Mössbauer effect studies of the GaCoMnO4−ZnFeMnO4 system

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      https://www.ias.ac.in/article/fulltext/jcsc/095/03/0297-0301

    • Keywords

       

      Spinel; isomer shift; quadrupole doublet; u parameter

    • Abstract

       

      Mössbauer studies have been carried out on the spinel system GaCoMnO4−ZnFeMnO4 at room temperature (294K) for the values ofX=0, 20, 40, 50, 60, 80 and 100 (whereX denotes the mole percent of ZnFeMnO4 in GaCoMnO4). All the compounds showed well resolved quadrupole split doublets. Isomer shift values varied between 0·26 and 0·48 mm/sec. The value of quadrupole splitting increased with increasingu parameter. The increase inu parameter is attributed to the replacement of Ga3+ by Zn2+ ions at the A-site. From Mössbauer studies, the ionic configuration of the system is suggested as$$Ga_{1 - x}^{3 + } Zn_x^{2 + } [Co_{1 - x}^{2 + } Fe_x^{3 + } Mn^{3 + } ]O_4^{2 - } $$

    • Author Affiliations

       

      Rita Ramachandran1 V S Darshane1

      1. Chemistry Department, Institute of Science, 15, Madame Cama Road, Bombay - 400 032, India
    • Dates

       
  • Journal of Chemical Sciences | News

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