High-field NMR study of the spin correlations in the spin-cluster mineral Na2Cu3O(SO4)3

被引：0

作者：

Ma, Long ^{[1
]}

Li, J. X. ^{[1
]}

Ling, L. S. ^{[1
]}

Han, Y. Y. ^{[1
]}

Zhang, L. ^{[1
]}

Hu, L. ^{[1
]}

Tong, W. ^{[1
]}

Xi, C. Y. ^{[1
]}

Pi, Li ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, High Magnet Field Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme C, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Hefei 230026, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 24期

关键词：

RELAXATION;

D O I：

10.1103/PhysRevB.107.245134

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a nuclear magnetic resonance study of the spin correlations in the spin-cluster-based mineral Na2Cu3O(SO4)3 with magnetic fields ranging from 1 to 33 T. The long-range magnetic order is observed from both the sudden spectral broadening at TN and the critical slowing down behavior in the temperature dependence of spin-lattice relaxation rates [1/T1(T )]. The hump behavior of 1/T1(T ) persists to & mu;0H = 7.25 T, above which a spin excitation gap is observed from the thermally activated temperature dependence of 1/T1. The gap size shows a linear field dependence, whose slope and intercept respectively yield an effective magnetic moment of 2.54 & mu;B and a 0.94-meV spin excitation gap under zero magnetic field. These results indicate the existence of short-range order and prominent easy-plane spin anisotropy, which are important for understanding the spin excitation spectrum in A2Cu3O(SO4)3.

引用

页数：5

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