SPIN FLUCTUATIONS IN FRUSTRATED KAGOME LATTICE SYSTEM SRCR8GA4O19 STUDIED BY MUON SPIN RELAXATION

被引：206
作者：
UEMURA, YJ
KEREN, A
KOJIMA, K
LE, LP
LUKE, GM
WU, WD
AJIRO, Y
ASANO, T
KURIYAMA, Y
MEKATA, M
KIKUCHI, H
KAKURAI, K
机构：
[1] FUKUI UNIV,DEPT APPL PHYS,FUKUI 910,JAPAN
[2] UNIV TSUKUBA,INST PHYS,TSUKUBA,IBARAKI 305,JAPAN
[3] UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.73.3306
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have performed muon spin relaxation measurements of the frustrated kagomé lattice spin system SrCr8Ga4O19. Our results demonstrate the slowing down of the Cr spin fluctuations when cooling toward the susceptibility-cusp temperature Tg∼3.5 K. The saturation of the relaxation rate below Tg, together with its weak dependence on longitudinal field (LF) between 0 and 2 kG, indicates the presence of dynamic spin fluctuations persisting even at T∼100 mK without static order parameter. We propose a spin-liquid type ground state to explain an undecouplable Gaussian shape of the relaxation function observed at T≤Tg. © 1994 The American Physical Society.
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页码：3306 / 3309
页数：4
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