论文标题
观察非共线性抗fiferromagnet中矢量自旋seebeck效应
Observation of Vector Spin Seebeck Effect in a Noncollinear Antiferromagnet
论文作者
论文摘要
迄今为止已经在具有共线矩的磁铁中建立了自旋现象，在该磁铁中，通过旋转Seebeck效应（SSE）的自旋注射始终沿着平面外向。在这里，我们报告了在非共线性抗铁磁铁（AF）lufeo $ _3 $中观察到矢量SSE的观察，其中温度梯度沿平面外部以及面板内方向可以注入纯旋转电流，又可以通过反旋转厅效应在重金属中在重金属中产生电压（ISHE）（ISHE）。我们表明，热电电压是由于lufeo $ _3 $的倾斜旋转的磁化造成的。此外，与生成，操纵和检测共线AFS中自旋电流的挑战相反，Lufeo $ _3 $中的向量SSE在零磁场中很容易可行，并且可以通过室温下约150 OE的小磁场来控制。非共线性AFS扩展了探索自旋现象的新领域，并为低场抗磁性自旋呼热量和镁提供了新的途径。
Spintronic phenomena to date have been established in magnets with collinear moments, where the spin injection through the spin Seebeck effect (SSE) is always along the out-of-plane direction. Here, we report the observation of a vector SSE in a noncollinear antiferromagnet (AF) LuFeO$_3$, where temperature gradient along the out-of-plane and also the in-plane directions can both inject a pure spin current and generate a voltage in the heavy metal via the inverse spin Hall effect (ISHE). We show that the thermovoltages are due to the magnetization from canted spins in LuFeO$_3$. Furthermore, in contrast to the challenges of generating, manipulating and detecting spin current in collinear AFs, the vector SSE in LuFeO$_3$ is readily viable in zero magnetic field and can be controlled by a small magnetic field of about 150 Oe at room temperature. The noncollinear AFs expand new realms for exploring spin phenomena and provide a new route to low-field antiferromagnetic spin caloritronics and magnonics.
