Transverse Relaxation Rate of Cu-NQR in YBa2Cu3O7−y and La2−xSrxCuO4

Ken-ichi Kumagai; Yoyu Nakamichi; Yuki Nakamura; Tomomasa Takatsuka; Haruo Nakajima

doi:10.1143/JPSJ.59.2336

Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

Transverse Relaxation Rate of Cu-NQR in YBa₂Cu₃O_7−y and La_2−xSr_xCuO₄

Ken-ichi Kumagai, Yoyu Nakamichi, Yuki Nakamura, Tomomasa Takatsuka, Haruo Nakajima

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Keywords: NQR, spin-spin relaxation time T₂, high-T_c superconductivity, La_2−xSr_xCuO₄, YBa₂Cu₃O₇

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1990 Volume 59 Issue 7 Pages 2336-2339

DOI https://doi.org/10.1143/JPSJ.59.2336

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Abstract

The temperature dependence of the nuclear transverse relaxation rate, 1⁄T₂, of Cu-NQR in YBa₂Cu₃O_7−y and La_2−xSr_xCuO₄ is measured in the superconducting and the normal states. The anomalous enhancement of 1⁄T₂ at the Cu(1) and Cu(2) sites is observed at 35 K in YBa₂Cu₃O_7−y but is not observed in the superconducting La_2−xSr_xCuO₄.

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