Abstract
Emission Mossbauer 61Cu(61Ni) spectra of simple MgO, NiO, Cu2O, CuO oxides and superconducting La2 − x Sr x CuO4, Nd2 − x Ce x CuO, and YBa2Cu3O7 − x copper metal oxides have been measured. It has been shown that emission Mossbauer spectroscopy on isotopes 61Cu(61Ni) makes it possible to determine the parameters of the electric gradient field tensor and magnetic field values in the copper sites of lattices of high-temperature superconductors and related materials.
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