Ga NMR study of the local susceptibility in kagome-based SrCr8Ga4O19:: Pseudogap and paramagnetic defects

被引：51

作者：

Mendels, P ^{[1
]}

Keren, A

Limot, L

Mekata, M

Collin, G

Horvatic, M

机构：

[1] Univ Paris Sud, Lab Phys Solide, UMR 8502, F-91405 Orsay, France

[2] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[3] Univ Fukui, Dept Appl Phys, Fukui 910, Japan

[4] Ctr Etud Saclay, CEA, CNRS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France

[5] CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France

[6] MPI FKF, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.85.3496

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first Ga(4f) NMR study of the Cr susceptibility in the archetype of kagome-based frustrated antiferromagnets, SrCr8Ga4O19. Our major finding is that the susceptibility of the frustrated lattice goes through a maximum around 50 K. Our data also support the existence of paramagnetic "clusters" of spins, responsible fur the Curie behavior observed in the macroscopic susceptibility at low T. These results set novel features for the constantly debated physics of geometrically frustrated magnets.

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页码：3496 / 3499

页数：4

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