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    • Keywords

       

      Electron spin resonance; Mn2+ ESR; low symmetry effects in ESR; Ca(N2H3COO)2H2O

    • Abstract

       

      Single crystals of calcium hydrazine carboxylate, monohydrate have been studied by ESR of Mn2+ doped in the calcium sites. X-band ESR indicated a large crystal field splitting necessitating experiments at Q band. The analysis shows two magnetically inequivalent (but chemically equivalent) sites withgxx = 2.0042±0.0038,gyy=2.0076 ±0.0029,gzz=2.0314±0.001,Azz=0.0099±0.0002 cm−1,Axx=0.0092±0.0002 cm−1,Ayy=0.0082±0.0002 cm−1,D=3/2Dzz=0.0558±0.0006 cm−1, andE=1/2 (DyyDyy)=0.0127±0.0002 cm−1.

      One of the principal components of the crystal field, (Dzz), is found to be along the Ca ↔ Ca direction in the structure and a second one, (Dxx), along the perpendicular to the plane of the triangle formed by three neighbouring calciums. TheA tensor is found to have an orientation different from that of theg andD tensors reflecting the low symmetry of the Ca2+ sites.

    • Author Affiliations

       

      M M Abdel Gawad1 G V Mahesh1 2 K C Patil1 2 S V Bhat1

      1. Department of Physics, Indian Institute of Science, Bangalore - 560 012, India
      2. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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