论文标题
$^{75} $作为反铁磁性亲托晶格化合物Ceniaso的NMR研究
$^{75}$As NMR study of the antiferromagnetic Kondo lattice compound CeNiAsO
论文作者
论文摘要
我们通过$^{75} $作为核磁共振测量值重新审视抗磁性围绕晶状体的磁性特性。我们的结果证实了CE时刻的连续两次连续的抗磁性过渡，$ t_ {n1} = 9.0（3）$ k和$ t_ {n2} = 7.0（3）$ k。为$ t_ {n2} <t_ p <t_ n2 <t_ n2 $ t <与以前的中子和兆族实验一致。在$ k（t）-χ（t）$缩放的情况下，骑士移动异常以下的特征在于$ t^*\ sim15 $ k以下，这给出了相干$ c-f $相关性的量度。自旋晶格放松率（$ 1/t_1 $）进一步证实了这种能量量表。自旋动力学的分析还揭示了CENIASO中自旋波动的准二维特征。这项工作为在压力下作为核磁共振研究的进一步$^{75} $铺平了道路。
We revisit the magnetic properties of the antiferromagnetic Kondo lattice CeNiAsO by $^{75}$As nuclear magnetic resonance measurements. Our results confirm two successive antiferromagnetic transitions of Ce moments at $T_{N1}=9.0(3)$ K and $T_{N2}=7.0(3)$ K. Incommensurate and commensurate antiferromagnetic orders are suggested for $T_{N2}<T<T_{N1}$ and $T<T_{N2}$ respectively, consistent with previous neutron and muon experiments. A Knight shift anomaly, characterized by the failure of $K(T)-χ(T)$ scaling, is observed below $T^*\sim15$ K, which gives a measure of the onset of coherent $c-f$ correlations. This energy scale is further confirmed by the spin-lattice relaxation rate ($1/T_1$). The analysis of spin dynamics also reveals a quasi-two-dimensional character of spin fluctuations in CeNiAsO. This work paves the way for further $^{75}$As nuclear magnetic resonance studies under pressure.
