Phase diagram of YBa$_2$Cu$_3$O$_{7-y}$ at T$<$T$_c$ based on Cu(2) transverse nuclear relaxation

A.V.Dooglav; A.V.Egorov; A.V.Savinkov; I.R.Mukhamedshin; M.V.Eremin; Yu.A.Sakhratov

arxiv: cond-mat/0105508 · v1 · submitted 2001-05-26 · ❄️ cond-mat.supr-con · cond-mat.str-el

Phase diagram of YBa₂Cu₃O_(7-y) at T<T_c based on Cu(2) transverse nuclear relaxation

M.V.Eremin , Yu.A.Sakhratov , A.V.Savinkov , A.V.Dooglav , I.R.Mukhamedshin , A.V.Egorov This is my paper

classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords phaserelaxationconnecteddiagrammagnetictransverseallowappearance

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Two maxima in transverse relaxation rate of Cu(2) nuclei in YBa$_2$Cu$_3$O$_{7-y}$ are observed, at T = 35 K and T = 47 K. Comparison of the $^{63}$Cu(2) and $^{65}$Cu(2) rates at T = 47 K indicates the magnetic character of relaxation. The enhancement at T = 47 K of fluctuating local magnetic fields perpendicular to the CuO$_2$ planes is connected with the critical fluctuations of orbital currents. Maximum at T = 35 K is connected with the appearance of inhomogeneous supeconducting phase. Together with data published to date, our experimental results allow to suggest a qualitatively new phase diagram of the superconducting phase.

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Phase diagram of YBa₂Cu₃O_(7-y) at T<T_c based on Cu(2) transverse nuclear relaxation

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