Spin magnetic susceptibility of Cu-O chains in Sr2CuO3 and SrCuO2

被引：4
|
作者：
Eisaki, H
Motoyama, N
Uchida, S
机构：
[1] Department of Superconductivity, University of Tokyo, Bunkyo-ku
来源：
PHYSICA C | 1997年 / 282卷
关键词：
D O I：
10.1016/S0921-4534(97)00730-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We show that the spin magnetic susceptibility of Sr2CuO3 and SrCuO2 with Cu-O chains is in excellent agreement with the theoretical calculation by Eggert, Affleck, and Takahashi on the S=1/2 antiferromagnetic Heisenberg chain. Both compounds have extraordinarily large exchange interaction energy J similar to 2200 K and reduced Neel temperature T-N < 5 K. In Sr2CuO3, a logarithmic correction, predicted by the theory, is clearly identified at low temperatures below 0.01 J similar to 20 K.
引用
收藏
页码：1323 / 1324
页数：2
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