Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126)

Takayuki Goto*, Takao Watanabe, Kyoichi Kinoshita, Azusa Matsuda, Masafumi Sera, Shinichi Sakatsume, Tetsuo Fukase

*この研究の対応する著者

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The temperature dependence of the 63/65Cu-NMR relaxation rate T1-1 and the spectrum of the lightly doped high-Tc cuprate La1.89Ca1.11Cu2O6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of 63νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T1T)-1 = 2600/(T + 110) (K - s)-1 in the normal state down to Tc indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.

本文言語English
ページ(範囲)2768-2771
ページ数4
ジャーナルjournal of the physical society of japan
65
9
DOI
出版ステータスPublished - 1996
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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