Entropy balance and evidence for local spin singlets in a Kagome-like magnet

被引：130

作者：

Ramirez, AP

Hessen, B

Winklemann, M

机构：

[1] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA

[2] Univ Groningen, Dept Chem, NL-9747 AG Groningen, Netherlands

[3] Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.84.2957

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the specific heat C(T) of the S = 3/2 Kagome-lattice-containing compound SrCr9pGa12-9pO19. We find little field dependence of the low-temperature C(T), consistent with a low-energy spectrum dominated by many-body singlet excitations. At high temperatures, we recover only similar to 50% of the total R ln4 entropy.

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页码：2957 / 2960

页数：4

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