论文标题
在螺旋抗fiferromagnet中，签名可调的各向异性磁路术和可检测到的双磁相
Sign-tunable anisotropic magnetoresistance and electrically detectable dual magnetic phases in a helical antiferromagnet
论文作者
论文摘要
Helimagnetic Order描述了由竞争交换相互作用引起的抗铁磁体的非共线自旋纹理。尽管共线抗铁磁铁是抗铁磁性（AFM）旋转型的元素构建基块，但迄今为止尚未阐明在非共线性抗fiferromagnets中实现旋转功能的潜力。在这里，我们提出了EUCO2AS2的AFM Helimagnet，作为一种新型的单相旋转材料，表现出各向异性磁阻（AMR）的显着标志逆转。 AMR的对比是由两个电磁相引起的，其自旋重新定向由位于易于平面上的磁场驱动，该磁场将AMR的符号从正极转换为负。此外，根据易于平面各向异性自旋模型，在理论上鉴定了与磁场下自旋结构在磁场下的演变相关的各种AFM记忆状态。这些结果表明，非连续性抗fiferromagnets具有开发自旋装置的潜力。
The helimagnetic order describes a non-collinear spin texture of antiferromagnets, arising from competing exchange interactions. Although collinear antiferromagnets are elemental building blocks of antiferromagnetic (AFM) spintronics, the potential of implementing spintronic functionality in non-collinear antiferromagnets has not been clarified thus far. Here, we propose an AFM helimagnet of EuCo2As2 as a novel single-phase spintronic material that exhibits a remarkable sign reversal of anisotropic magnetoresistance (AMR). The contrast in the AMR arises from two electrically distinctive magnetic phases with spin reorientation driven by magnetic field lying on the easy-plane, which switches the sign of the AMR from positive to negative. Further, various AFM memory states associated with the evolution of the spin structure under magnetic fields were identified theoretically, based on an easy-plane anisotropic spin model. These results reveal that non-collinear antiferromagnets hold potential for developing spintronic devices.
