Bulk CsEuBr₃ and CsEuCl₃ are experimentally shown to be magnetic semiconductors that order antiferromagnetically at Néel temperatures of 2.0 K and 1.0 K, respectively. Given that nanoparticles and thin films of CsEuCl₃ have been reported to order ferromagnetically at a similar temperature, our observation of antiferromagnetic ordering in CsEuBr₃ and CsEuCl₃ expands the possible applications of halide perovskites to now include spintronic devices where both ferromagnetic and antiferromagnetic devices can be fabricated from a single material. The conclusion that CsEuCl₃ can be used as a switchable magnetic material is also supported by our density-functional theory calculations.

中文翻译：

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稀土卤化物钙钛矿 CsEuBr3 和 CsEuCl3 中的反铁磁序

块状 CsEuBr ₃和 CsEuCl ₃经实验证明是磁性半导体，分别在 2.0 K 和 1.0 K 的奈尔温度下以反铁磁方式排列。鉴于已报道CsEuCl ₃的纳米粒子和薄膜在相似温度下进行铁磁排序，我们对 CsEuBr ₃和 CsEuCl ₃中反铁磁排序的观察扩展了卤化物钙钛矿的可能应用，现在包括自旋电子器件，其中铁磁和反铁磁器件都可以由单一材料制成。_{我们的密度泛函理论计算也支持了CsEuCl 3}可以用作可转换磁性材料的结论。