Experimental studies of the anomalous Hall effect are performed for thin-film $\mathrm{Ta}/\mathrm{Tb}\text{−}\mathrm{Fe}\text{−}\mathrm{Co}$ over a wide range of temperatures and magnetic fields up to 3 T. Far from the compensation temperature ($T_{M}$ = 277 K), the field dependence has a conventional shape of a single hysteresis loop; just below the compensation point, the dependence is anomalous with the shape of a triple hysteresis. To understand this behavior, we experimentally reveal the magnetic phase diagram and theoretically analyze it in terms of spin-flop-like phase transitions. In this case, we observe the dominance of the $\mathrm{Fe}\text{−}\mathrm{Co}$ sublattice, which is a subject of the strong interaction with the $\mathrm{Ta}$ layer. This $\mathrm{Fe}\text{−}\mathrm{Co}$ anisotropy enhancement is expressed in the appearance of abnormal wing-shaped hysteresis loops near the compensation point and, in the unusual phase diagram, where the first-order phase transition line deviates towards low temperatures. This effect can be useful for the design of ultrafast ferrimagnetic devices with desired switching parameters.

中文翻译：

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Ta / Tb-Fe-Co中异常霍尔效应的异常场相关性

对薄膜进行霍尔效应反常的实验研究 $钽/b\text{-}铁\text{-}\mathrm{有限公司}$在高达3 T的温度和磁场范围内。远离补偿温度（$ T_ {M} $ = 277 K），场相关性具有单个磁滞回线的常规形状；在补偿点以下，相依性是异常的，具有三重磁滞的形状。为了理解这种行为，我们通过实验揭示了磁相图，并从理论上以类似自旋触发器的相变对其进行了分析。在这种情况下，我们观察到$铁\text{-}\mathrm{有限公司}$ 子晶格是与 $钽$层。这个$铁\text{-}\mathrm{有限公司}$各向异性的增强表现为在补偿点附近出现异常的翼形磁滞回线，并且在不寻常的相图中，一阶相变线向低温方向偏移。对于具有所需开关参数的超快速亚铁磁器件的设计，此效果可能有用。