Abstract
Two peaks are observed at T=35 and 47 K in the transverse relaxation rate for Cu(2) nuclei in YBa2Cu3O7−y . A comparison of the relaxation rates for isotopes 63Cu(2) and 65Cu(2) at T=47 K indicates the magnetic nature of relaxation. The enhancement of local magnetic field fluctuations perpendicular to CuO2 planes at T=47 K is associated with critical fluctuations of orbital currents. The peak at T=35 K is attributed to the emergence of an inhomogeneous superconducting phase. The obtained experimental results and the available data from the literature made it possible to propose a qualitatively new phase diagram of the superconducting state.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
O. N. Bakharev, R. Sh. Zhdanov, A. V. Egorov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 47, 383 (1988) [JETP Lett. 47, 458 (1988)].
A. V. Bondar’, S. M. Ryabchenko, Yu. V. Fedotov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 50, 133 (1989) [JETP Lett. 50, 146 (1989)].
K. Kumagai, Y. Nakamichi, Y. Nakamura, et al., J. Phys. Soc. Jpn. 59, 2336 (1990).
M. Tei, H. Takai, K. Mizoguchi, et al., Z. Naturforsch. A 45, 429 (1990); M. Tei, H. Takai, K. Mizoguchi, et al., Solid State Commun. 74, 1117 (1990).
Y. Itoh, H. Yasuoka, and Y. Ueda, J. Phys. Soc. Jpn. 59, 3463 (1990).
F. J. Ohkawa, J. Phys. Soc. Jpn. 61, 639 (1992).
S. Krämer and M. Mehring, Phys. Rev. Lett. 83, 396 (1999); Phys. Rev. Lett. 84, 1637 (2000).
B. Grevin, Y. Berthier, and G. Collin, Phys. Rev. Lett. 84, 1636 (2000).
M. Tei, K. Mizoguchi, and K. Kume, in The Physics and Chemistry of Oxide Superconductors, Ed. by Y. Iye and H. Yasuoka (Springer-Verlag, Berlin, 1992); Springer Proc. Phys. 60, 369 (1992).
J. L. Tallon and J. W. Loram, cond-mat/0005063.
M. V. Eremin and I. A. Larionov, Pis’ma Zh. Éksp. Teor. Fiz. 68, 583 (1998) [JETP Lett. 68, 611 (1998)].
E. Cappelluti and R. Zeycher, Phys. Rev. B 59, 6475 (1999).
S. Chakravarty, R. B. Laughlin, D. K. Morr, et al., Phys. Rev. B 63, 094503 (2001).
T. Ekino, Y. Sezaki, and H. Fujii, Phys. Rev. B 60, 6916 (1999); T. Ekino, S. Hashimoto, and H. Fujii, J. Phys. Chem. Solids 62, 149 (2001).
S. Tewari, H.-Y. Kee, Ch. Nayak, et al., cond-mat/0101027.
M. Eremin and A. Rigamonti, cond-mat/0103282.
C. H. Pennington, D. J. Durand, C. P. Slichter, et al., Phys. Rev. B 39, 274 (1989); C. H. Pennington and C. P. Slichter, Phys. Rev. Lett. 66, 381 (1991).
A. Abragam, The Principles of Nuclear Magnetism (Clarendon Press, Oxford, 1962; Inostrannaya Literatura, Moscow, 1963), p. 125.
Y. Itoh, K. Yoshimura, T. Ohomura, et al., J. Phys. Soc. Jpn. 63, 1455 (1994).
B. Grevin, Y. Berthier, and G. Collin, Phys. Rev. Lett. 85, 1310 (2000).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 10, 2001, pp. 609–612.
Original Russian Text Copyright © 2001 by Eremin, Sakhratov, Savinkov, Dooglav, Mukhamedshin, Egorov.
Rights and permissions
About this article
Cite this article
Eremin, M.V., Sakhratov, Y.A., Savinkov, A.V. et al. Phase diagram of YBa2Cu3O7−y at T<T c according to transverse nuclear relaxation data for Cu(2). Jetp Lett. 73, 540–543 (2001). https://doi.org/10.1134/1.1387523
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1387523