We present a study on the structural and magnetic properties of thin films of the high entropy perovskite $\mathrm{Dy}\left({\mathrm{Fe}}_{0.2}{\mathrm{Mn}}_{0.2}{\mathrm{Co}}_{0.2}{\mathrm{Cr}}_{0.2}{\mathrm{Ni}}_{0.2}\right){\mathrm{O}}_3$ (Dy5BO). An element-sensitive investigation was performed using synchrotron-based x-ray absorption spectroscopy, employing x-ray magnetic circular and linear dichroism. The results reveal that the moments residing on the $3d$ transition metal ions and the rare-earth $\mathrm{Dy}$ ions produce a saturation magnetization one order of magnitude larger than any previously studied high-entropy oxide perovskite. Employing temperature-dependent x-ray magnetic linear dichroism, we see clear features of a spin reorientation at the $\mathrm{Mn}$ and $\mathrm{Fe}$ sites, occurring around 18 K, likely driven by the interaction of the corresponding transition metal ions and $\mathrm{Dy}$.

中文翻译：

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镝基高熵氧化物钙钛矿薄膜中的自旋重新取向

我们对高熵钙钛矿薄膜的结构和磁性能进行了研究$镝（{铁}_{0.2}{锰}_{0.2}{钴}_{0.2}{铬}_{0.2}{你}_{0.2}）{\mathrm{氧}}_3$(Dy5BO)。使用基于同步加速器的 X 射线吸收光谱、X 射线磁圆和线性二色性进行元素敏感研究。结果表明，驻留在$3d$过渡金属离子和稀土$镝$离子产生的饱和磁化强度比任何先前研究的高熵氧化物钙钛矿大一个数量级。利用温度相关的 X 射线磁线性二向色性，我们看到了自旋重新取向的明显特征$锰$和$铁$位点，发生在 18 K 左右，可能是由相应的过渡金属离子和$镝$。