The structure and superconducting properties of a monodomain crystal YBa2Cu2.1Au0.36O<i>x</i>
V. V. MitkevichA. M. Gorky State University, KharkovS. A. Vasil’chenkoM. V. Lomonosov State University, MoscowA. V. BondarenkoA. M. Gorky State University, KharkovВ. І. ДоценкоA. M. Gorky State University, KharkovI. M. DmitrenkoA. M. Gorky State University, KharkovM. A. Obolenskiı̆M. V. Lomonosov State University, MoscowS. M. TretyakPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. V. TelezhenkoM. V. Lomonosov State University, Moscow
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The χ-scanning of the profiles of the 330 and 33¯0 reflexes led to the discovery of a monodomain crystal with Tc = 91 K. According to the χac(T) data, the superconducting transition width of this crystal is smaller than 0.5 K. The structure of the crystal was thoroughly investigated twice after annealing at 400 and 300 °C. The oxygen content and the presence of gold in the sample were estimated from diffraction data.
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