论文标题
在3D-5D钙钛矿氧化物复合膜中用于绝缘体旋转蛋白酶的绝缘铁磁性和垂直磁各向异性的出现
Emergence of insulating ferrimagnetism and perpendicular magnetic anisotropy in 3d-5d perovskite oxide composite films for insulator spintronic
论文作者
论文摘要
具有较强垂直磁各向异性（PMA）的磁绝缘子在探索纯自旋电流现象和开发超流动性旋转器设备方面起着关键作用，因此非常需要开发新的材料平台。在这里，我们报告LA2/3SR1/3MNO3（LSMO）-SRIRO3（SIO）复合氧化物膜（LSMIO）的外延生长具有不同的结晶方向，该晶体取向通过脉冲激光沉积物的顺序两键式烧蚀过程制造。 LSMIO膜在原子水平上具有LSMO和SIO的均匀混合物表现出较高的结晶质量。观察到铁磁性和绝缘运输特性，莫特可变范围跳跃模型的温度依赖性电阻率很好。此外，LSMIO电影显示出强大的PMA。通过进一步构建铁磁性绝缘子LSMIO的所有钙岩氧化物异质结构和强的自旋轨道耦合的SIO层，明显的自旋霍尔磁场（SMR）和旋转霍尔样的异常霍尔效应（SH-AHE）。这些结果说明了铁磁性绝缘子LSMIO在开发全氧化物超衰减旋转器件中的潜在应用。
Magnetic insulators with strong perpendicular magnetic anisotropy (PMA) play a key role in exploring pure spin current phenomena and developing ultralow-dissipation spintronic devices, thereby it is highly desirable to develop new material platforms. Here we report epitaxial growth of La2/3Sr1/3MnO3 (LSMO)-SrIrO3 (SIO) composite oxide films (LSMIO) with different crystalline orientations fabricated by sequential two-target ablation process using pulsed laser deposition. The LSMIO films exhibit high crystalline quality with homogeneous mixture of LSMO and SIO at atomic level. Ferrimagnetic and insulating transport characteristics are observed, with the temperature-dependent electric resistivity well fitted by Mott variable-range-hopping model. Moreover, the LSMIO films show strong PMA. Through further constructing all perovskite oxide heterostructures of the ferrimagnetic insulator LSMIO and a strong spin-orbital coupled SIO layer, pronounced spin Hall magnetoresistance (SMR) and spin Hall-like anomalous Hall effect (SH-AHE) were observed. These results illustrate the potential application of the ferrimagnetic insulator LSMIO in developing all-oxide ultralow-dissipation spintronic devices.
