EPR of photochromic Mo3+ in SrTiO3
Abstract
In single crystals of SrTiO3, a paramagnetic center, characterized by S = 3/2 and hyperfine interaction with an I = 5/2 nuclear spin has been observed in the temperature range 4.2K-77K by means of EPR. The impurity center is attributed to Mo3+. No additional line splitting in the EPR spectrum due to the 105K phase transition has been observed. At 4.2K the following spin Hamiltonian parameters for this impurity ion were obtained: g = 1.95460.0010 and A = (32.00.05)×10-4 cm-1.
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