近日，美国康奈尔大学Daniel C. Ralph团队研究了电可调阻尼反铁磁共振的自旋滤波器隧穿探测。相关论文于2025年7月10日发表在《科学》杂志上。

与铁磁自旋电子学相比，反铁磁自旋电子学提供了更高频率操作的潜力，并改善了对磁场的不敏感性。然而，以前检测反铁磁动力学的电子技术使用的是毫米级的大块晶体。

研究组展示了在PtTe₂/双层CrSBr/石墨结中以范德华反铁磁CrSBr为隧道势垒的自旋滤波器隧道中，在几微米尺度上对结构中的反铁磁共振的直接电检测。这种样品的几何结构不仅允许有效的检测，而且可以通过PtTe₂电极的自旋轨道扭矩对反铁磁共振进行电气控制。有效地探测和控制反铁磁共振的能力使得对控制这些高频动力学的物理进行详细的研究成为可能。

附：英文原文

Title: Spin-filter tunneling detection of antiferromagnetic resonance with electrically tunable damping

Author: Thow Min Jerald Cham, Daniel G. Chica, Xiaoxi Huang, Kenji Watanabe, Takashi Taniguchi, Xavier Roy, Yunqiu Kelly Luo, Daniel C. Ralph

Issue&Volume: 2025-07-10

Abstract: Antiferromagnetic spintronics offers the potential for higher-frequency operations and improved insensitivity to magnetic fields compared to ferromagnetic spintronics. However, previous electrical techniques to detect antiferromagnetic dynamics have utilized large, millimeter-scale bulk crystals. Here we demonstrate direct electrical detection of antiferromagnetic resonance in structures on the few-micrometer scale using spin-filter tunneling in PtTe2/bilayer CrSBr/graphite junctions in which the tunnel barrier is the van der Waals antiferromagnet CrSBr. This sample geometry allows not only efficient detection, but also electrical control of the antiferromagnetic resonance through spin-orbit torque from the PtTe2 electrode. The ability to efficiently detect and control antiferromagnetic resonance enables detailed studies of the physics governing these high-frequency dynamics.

DOI: adq8590

Source: https://www.science.org/doi/10.1126/science.adq8590