Magnetic susceptibility of ideal spin 1/2 Heisenberg antiferromagnetic chain systems, Sr2CuO3 and SrCuO2

被引：409

作者：

Motoyama, N

Eisaki, H

Uchida, S

机构：

[1] Department of Superconductivity, The University of Tokyo, Tokyo, 113, Bunkyo-Ku

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.76.3212

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic susceptibility is measured on the one-dimensional spin 1/2 antiferromagnets Sr2CuO3 and SrCuO2 using single crystals. Large, nearly contamination-free single crystals enable us to measure the intrinsic spin susceptibility over a wide temperature range between 5 and 800 K. The results are in excellent agreement with the recent calculation by Eggert, Affleck, and Takahashi, and the exchange interaction energy J is estimated to be 2200 +/- 200 and 2100 +/- 200 K, respectively. In Sr2CuO3, an isotropic susceptibility drop is observed below about 20 K, which is also consistent with the result of this rigorous calculation.

引用

页码：3212 / 3215

页数：4

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