Electron Spin Resonance of VO^<2+> Ions in (NH_4)_2Mg_2(SO_4)_3 and K_2Mg_2(SO_4)_3

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概要

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• The ESR of Vo^<2+> ions in single crystals of ammonium magnesium sulphate and potassium magnesium sulphate is observed. The V-O axis is found to have four possible orientations giving rise to four magnetic complexes in each crystal. In both the crystals the V-O axis of two magnetic complexes lies in the (1^^-10) plane while the axis of the other two complexes lies in the plane perpendicular to (1^^-10). In (NH_4)_2Mg_2(SO_4)_3 the populations in the four possible orientations of V-O axis are in the ratio of 2:1:2:1 while the populations are in the ratio of 2:3:2:3 in K_2Mg_2(SO_4)_3. The complexes with identical populations are equivalent but for the change in the relative directions of their axes. The vanadyl hyperfine lines in (NH_4)_2Mg_2(SO_4)_3 show an additional anisotropic hyperfine structure of five lines which is apparently due to superhyperfine interaction of the unpaired spins of the transition metal ion, with some of the protons of the surrounding (NH_4)^+ molecules. All the spectra in both the crystals have been analysed using the spin-Hamiltonian corresponding to rhombic symmetry and the spin Hamiltonian parameters are presented.

• 社団法人日本物理学会の論文
• 1970-07-05

著者

• Chowdari B.

  Department Of Physics Indian Institute Of Technology

• Chowdari B.

  Department Of Physics Indian Institute Of Technology:(present Address) Department Of Nuclear Enginee

• Chowdari B.V.R.

  Department of Physics, Indian Institute of Technology

関連論文

• EPR Studies of VO^ in Single Crystals of BaCl_2・2H_2O and BaBr_2・2H_2O
• Electron Spin Resonance of VO^ Ions in (NH_4)_2Zn_2(SO_4)_3
• Electron Spin Resonance Studies of VO^ in Rb_2SO_4 Single Crystals
• Electron Spin Resonance of VO^ Ions in (NH_4)_2Mg_2(SO_4)_3 and K_2Mg_2(SO_4)_3

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