The electron-paramagnetic-resonance spectrum of the 3d⁵ configuration of iron in cubic symmetry has been observed in iron-doped indium arsenide. The spin-Hamiltonian parameters describing this spectrum are g=2.035±0.002 and a=+(421±1)×10^-4 cm^-1. The inhomogeneously broadened line is approximately 130 G wide. A comparison is made with the M\"ossbauer effect of Fe⁵⁷ in InAs studied by Bemski and Fernandes. The results are discussed in terms of charge-transfer configuration admixtures introduced by Fidone and Stevens and elaborated by Watanabe and co-workers.
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T. L. Estle (1964) studied this question.
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