Electron spin resonance of vanadium in silver chloride

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Abstract
Vanadium-doped silver chloride is prepared by dipping vanadium metal into molten silver chloride. The vanadium enters the lattice substitutionally in the doubly ionized state. Silver-ion vacancies are associated with the vanadium ions in next-nearest cation positions at 93 °K. The symmetry of the crystal field at the vanadium ions is tetragonal and the values of the constants in the spin Hamiltonian are D = (5572 ± 09) × 10-4 cm-1, A = (777 ± 05) × 10-4 cm-1, B = (763 ± 05) × 10-4 cm-1, gparallel = 19657 ± 00007 and gperpendicular = 19666 ± 00007. At 415 °K the vacancies are no longer associated. The field symmetry is octahedral and the values of the constants in the spin Hamiltonian are A = (777 ± 05) × 10-4 cm-1 and g = 19657 ± 00007. The situation is similar to that reported by Grossberg and by Daehler for manganese in silver chloride. The temperature variation in the width of lines which constitute the outer fine-structure components of the spectrum gives an activation energy of 030 ± 005 ev for vacancy motion. Vanadium-doped silver chloride is not found to be noticeably photo-active.