论文标题
零场电流诱导的甲状腺类金属效应
Zero-field current-induced Hall effect in ferrotoroidic metal
论文作者
论文摘要
我们已经对螺母候选材料Uni4b进行了精确的大厅测量。低于Neel温度Tn〜20 K（对应于螺品转变温度），即使在零场处，HALL电压也变得有限，并且与电流密度的平方成正比变化。相比之下，它几乎高于TN。此外，我们发现，通过我们的HALL效应测量值估算出电流引起的磁化在质量上与先前的直接测量值一致。这些结果提供了有力的证据，证明了在铁螺母金属中具有独特的磁电现象 - 零场非线性霍尔效应是由电流诱导的磁化强度连接连接螺母型矩的。
We have performed precise Hall measurements for the ferrotoroidic candidate material UNi4B. Below Neel temperature TN ~ 20 K (corresponding to the ferrotoroidic transition temperature), a Hall voltage becomes finite even at zero field and changes proportional to the square of current density; by contrast, it is almost zero above TN. Moreover, we have found that a current-induced magnetization estimated from our Hall effect measurements is qualitatively consistent with the previous directly measured value. These results provide strong evidence for a magnetoelectric phenomenon uniquely in ferrotoroidic metals -- a zero-field nonlinear Hall effect resulting from the current-induced magnetization connecting the ferrotoroidal moments.
