Phase diagram of YBa2Cu3O7-y at T < Tc according to transverse nuclear relaxation data for Cu(2)

被引：7

作者：

Eremin, MV ^{[1
]}

Sakhratov, YA ^{[1
]}

Savinkov, AV ^{[1
]}

Dooglav, AV ^{[1
]}

Mukhamedshin, IR ^{[1
]}

Egorov, AV ^{[1
]}

机构：

[1] Kazan State Univ, Kazan 420008, Russia

来源：

JETP LETTERS | 2001年 / 73卷 / 10期

关键词：

D O I：

10.1134/1.1387523

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Cu-63(2) and Cu-65(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. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：540 / 543

页数：4

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