Hyperfine Interactions of Copper Ions in the Structure
of High-Temperature Superconductors

G. A. Bordovskii, N. I. Anisimova, A. V. Marchenko, T. Yu. Rabchanova,
P. P. Seregin, and E. A. Tomil’tsev

Herzen State Pedagogical University of Russia, nab. Moiki 48, St. Petersburg, 191186 Russia

e-mail: ppseregin@mail.ru

Received October 16, 2012

Abstract—Emission Mössbauer ⁶¹Cu(⁶¹Ni) spectra of simple MgO, NiO, Cu₂O, CuO oxides and supercon-
ducting La_2–xSr_xCuO₄, Nd_2–xCe_xCuO, and YBa₂Cu₃O_7–x copper metal oxides have been measured. It has
been shown that emission Mössbauer 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.

Keywords: emission Mössbauer spectroscopy, electric field gradient tensor, HTSC

DOI: 10.1134/S1087659614030043

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