In this paper, ¹³³Cs nuclear magnetic resonance (NMR) measurements have been performed to investigate the magnetic properties of an A-type antiferromagnet CsCo${}_2$Se${}_2$. The field-sweeping NMR spectra become broadened mainly due to the internal magnetic field attributed to antiferromagnetic ordering. Both $T$-dependence of Knight shift ${}^{133}K$ and $T$ divided spin-lattice relaxation rate 1/$T_{1}T$ provide clear evidences for the antiferromagnetic transition at $\sim$ 70 K. 1/$T_{1}T$ exhibits a Curie–Weiss $T$-dependence down to 80 K, suggesting the development of antiferromagnetic spin fluctuations with decreasing temperature. The linear-relationship between $T_{1}T$-$T$ suggests that antiferromagnetic spin fluctuations are two-dimensional in the paramagnetic state.

在本文中，已经进行了¹³³ Cs核磁共振（NMR）测量，以研究A型反铁磁体CsCo的磁性能。${}_{\mathrm{2个}}$硒${}_{\mathrm{2个}}$。归因于反铁磁有序的内部磁场，扫场NMR谱变宽了。两个都$Ť$骑士转变的依赖 ${}^{133}ķ$ 和 $Ť$ 自旋晶格弛豫率除以1 /${Ť}_{\mathrm{1个}}Ť$ 提供清晰的证据证明反铁磁转变在 $〜$ 70 K.1 /${Ť}_{\mathrm{1个}}Ť$ 展示居里·魏斯 $Ť$-依赖性低至80 K，表明反铁磁自旋波动随温度降低而发展。两者之间的线性关系${Ť}_{\mathrm{1个}}Ť$--$Ť$ 这表明在顺磁状态下反铁磁自旋涨落是二维的。