Abstract We present the successful intercalation of europium into graphite by using an original method based on LiCl-KCl molten salts mixture. After solubilization of europium in the liquid chlorides mixture at 450 °C, reactivity toward graphite is investigated. We evidence the formation of the first stage EuC6 Graphite Intercalation Compound (GIC) with a repeat distance Ic = 487 pm. Using 00l X-ray diffraction and ion beam analysis, we show that europium is intercalated into the bulk with remarkable degree of homogeneity. This is also confirmed by magnetic measurements that clearly put in evidence the antiferromagnetic transition at about TN = 40 K. Below such temperature the characteristic step-like behavior of metamagnetic transitions was found by isothermal magnetization measurements, that is generally visible only in highly pure samples.

中文翻译：

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LiCl-KCl 共晶熔盐作为将金属嵌入石墨的原始有效介质：以铕为例

摘要 我们介绍了使用基于 LiCl-KCl 熔盐混合物的原始方法成功地将铕嵌入石墨中。在 450 °C 下将铕溶解在液态氯化物混合物中后，研究了对石墨的反应性。我们证明了第一阶段 EuC6 石墨插层化合物 (GIC) 的形成，重复距离 Ic = 487 pm。使用 00l X 射线衍射和离子束分析，我们表明铕以显着的均匀度嵌入到块体中。磁性测量也证实了这一点，该测量清楚地证明了大约 TN = 40 K 处的反铁磁转变。在该温度以下，通过等温磁化测量发现了变磁转变的特征阶梯状行为，这通常仅在高纯度样品中可见.