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arXiv 0811.3367cond-mat.str-el
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稀土Kagomé Pr $_3$ Ga $_5$ SiO $_{14}$中自旋的动力学行为

Dynamical Behavior of Spins in the Rare-Earth Kagomé Pr$_3$Ga$_5$SiO$_{14}$

L. L. Lumata, K. -Y. Choi, T. Besara, M. J. R. Hoch, H. D. Zhou, J. S. Brooks, P. L. Kuhns, A. P. Reyes, N. S. Dalal, C. R. Wiebe

摘要:

我们报告使用$^{69,71}$ Ga核磁共振探测自旋动力学在稀土kagomé系统Pr $_3$ Ga $_5$ SiO $_{14}$。我们发现自旋-晶格弛豫速率$^{69}1/T_1$在30 K附近有一个最大值,低于该值时Pr $^{3+}$自旋相关时间$τ$表现出与场相关能隙一致的场相关行为.自旋-自旋弛豫速率$^{69}1/T_{2}$在较低温度(10 K)下呈现峰值,低于该峰值时,观察到接近于$T^{2}$的场依赖幂律行为。这些结果表明,磁场诱导形成的纳米级磁簇与最近的中子散射测量相一致。

英文摘要:

We report on the use of $^{69,71}$Ga nuclear magnetic resonance to probe spin dynamics in the rare-earth kagomé system Pr$_3$Ga$_5$SiO$_{14}$. We find that the spin-lattice relaxation rate $^{69}1/T_1$ exhibits a maximum around 30 K, below which the Pr$^{3+}$ spin correlation time $τ$ shows novel field-dependent behavior consistent with a field-dependent gap in the excitation spectrum. The spin-spin relaxation rate $^{69}1/T_{2}$ exhibits a peak at a lower temperature (10 K) below which field-dependent power-law behavior close to $T^{2}$ is observed. These results point to field-induced formation of nanoscale magnetic clusters consistent with recent neutron scattering measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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