• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/062/01/0077-0086

    • Keywords

       

      EPR; interstitial; distortion; spin Hamiltonian; invariant

    • Abstract

       

      Single crystal EPR studies of Mn(II)-doped zinc ammonium phosphate hexahydrate (ZnNH4PC4·6H2O) have been reinvestigated at room temperature. Single crystal rotations along the three orthogonal axes indicate that the spin Hamiltonian parameters for the interstitial site are:gxx = 1.966,gyy = 1.972,gzz = 1.976;Dxx = -12.28 mT,Dyy = -2.09 mT andDzz = 14.37 mT;Axx = 9.06 mT,Ayy = 9.06 mT andAzz = 11.09 mT;a = -0.11 mT. These parameters differ considerably from the previous report of Chand and Agarwal and indicate the orthorhombic nature of the paramagnetic impurity. The impurity is found to enter the lattice interstitially, in contrast to earlier prediction of substitutional position. The percentage covalency of the Mn-0 bond has been estimated.

    • Author Affiliations

       

      H Anandalakshmi1 K Velavan1 I Sougandi1 R Venkatesan1 P Sambasiva Rao1

      1. Department of Chemistry, Pondicherry University, Pondicherry - 605 014, India
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.