The effect of chemical substitution on the ground state of the geometrically frustrated antiferromagnet ${\mathrm{CsCrF}}_4$ has been investigated through a neutron powder diffraction experiment. Magnetic Fe-substituted ${\mathrm{CsCr}}_{0.94}{\mathrm{Fe}}_{0.06}{\mathrm{F}}_4$ and nonmagnetic Al-substituted ${\mathrm{CsCr}}_{0.98}{\mathrm{Al}}_{0.02}{\mathrm{F}}_4$ samples are measured, and magnetic Bragg peaks are clearly observed in both samples. Magnetic structure analysis revealed a ${120}^{\circ }$ structure having a magnetic propagation vector ${\mathit{k}}_{\mathrm{mag}}=(0,0,1/2)$ in ${\mathrm{CsCr}}_{0.94}{\mathrm{Fe}}_{0.06}{\mathrm{F}}_4$. For ${\mathrm{CsCr}}_{0.98}{\mathrm{Al}}_{0.02}{\mathrm{F}}_4$, a quasi-${120}^{\circ }$ structure having ${\mathit{k}}_{\mathrm{mag}}=(1/2,0,1/2)$ is formed. It is notable that the identified magnetic structure in ${\mathrm{CsCr}}_{0.94}{\mathrm{Fe}}_{0.06}{\mathrm{F}}_4$ belongs to a different phase of ground states from those in ${\mathrm{CsCr}}_{0.98}{\mathrm{Al}}_{0.02}{\mathrm{F}}_4$ and the parent ${\mathrm{CsCrF}}_4$. These results suggest that the Fe substitution strongly influences the ground state of ${\mathrm{CsCrF}}_4$.

中文翻译：

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化学取代的受阻反铁磁体CsCrF4中的磁序

化学取代对几何受挫反铁磁体基态的影响 ${\mathrm{氯化铬}}_4$已经通过中子粉末衍射实验进行了研究。磁性铁取代${铬}_{0.94}{铁}_{0.06}{\mathrm{F}}_4$ 和非磁性铝取代 ${铬}_{0.98}{铝}_{0.02}{\mathrm{F}}_4$测量样品，并在两个样品中清楚地观察到布拉格磁峰。磁结构分析表明${120}^{\circ }$ 具有磁传播矢量的结构 ${\mathit{ķ}}_{磁}=（0，0，\mathrm{1个}/2）$ 在 ${铬}_{0.94}{铁}_{0.06}{\mathrm{F}}_4$。对于${铬}_{0.98}{铝}_{0.02}{\mathrm{F}}_4$，准${120}^{\circ }$ 具有的结构 ${\mathit{ķ}}_{磁}=（\mathrm{1个}/2，0，\mathrm{1个}/2）$形成了。值得注意的是，在${铬}_{0.94}{铁}_{0.06}{\mathrm{F}}_4$ 属于与 ${铬}_{0.98}{铝}_{0.02}{\mathrm{F}}_4$ 和父母 ${\mathrm{氯化铬}}_4$。这些结果表明，Fe的取代强烈影响基态。${\mathrm{氯化铬}}_4$。