Anisotropy study of the spin-lattice relaxation rates at the Cu(1) chain sites of YBa2Cu3O7 and YBa2Cu4O8

被引：2

作者：

Goto, A ^{[1
]}

Shimizu, T

Aoki, H

Kato, M

Yoshimura, K

Kosuge, K

Matsumoto, T

Yamada, Y

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

[2] Kyoto Univ, Fac Sci, Dept Chem, Sakyo Ku, Kyoto 6068224, Japan

[3] Shimane Univ, Dept Mat Sci, Matsue, Shimane 6900823, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 03期

关键词：

YBa2Cu3O7; YBa2Cu4O8; Cu-O chain; NMR; anisotropy;

D O I：

10.1143/JPSJ.67.759

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Anisotropies of the spin-lattice relaxation rates (1/T-1) at the Cu(1) sites of YBa2Cu3O7 and YBa2Cu4O8 were examined using the NMR/NQR methods. The anisotropy data enabled us to infer approximate q-dependences and anisotropies of the form factors (F-alpha(q(y)), alpha = a, b, c) at Cu(1). We found that the anisotropies in YBa2Cu3O7 are explainable only in terms of the hyperfine fields within a single chain, while these hyperfine fields do not account for anisotropies in YBa2Cu4O8. As a possible explanation for the situation in YBa2Cu4O8, effects of the transferred hyperfine fields from the other chain of the double Cu-O chains are discussed.

引用

页码：759 / 762

页数：4

共 22 条

[1] SINGLE-SPIN FLUID, SPIN GAP, AND D-WAVE PAIRING IN YBA2CU4O8 - A NMR AND NQR STUDY [J].