School of Electronic and Information Engineering, State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , China.
Department of Materials Science and Engineering , Southern University of Science and Technology , Shenzhen 518055 , China.
ACS Appl Mater Interfaces. 2018 Sep 26;10(38):32331-32336. doi: 10.1021/acsami.8b09984. Epub 2018 Sep 14.
With the advances in artificial intelligence and communication technologies, flexible microwave magnetic materials have become essential for flexible microwave detectors, wearable microwave sensors, and flexible spintronics. Here, a highly stable in-plane (IP) ferromagnetic resonance (FMR) and a tunable out-of-plane (OOP) FMR character are demonstrated in the flexible microwave magnetic LiZnFeO (LZFO) (111) epitaxial thin films under external mechanical bending. Both the IP FMR line width and resonance field ( H) are basically unchanged when the sample was bent under an external tensile or compressive bending strain and deformation. However, the OOP FMR spectra (including H and absorption peak) could be tuned by mechanical bending, i.e., the LZFO sample possesses two OOP FMR absorption peaks at an external bending curvature. Meanwhile, excellent mechanical antifatigue and mechanical retention characteristics have also been obtained in the LZFO sample. The highly stable IP and the tunable OOP FMR spectra in the same LZFO sample with excellent mechanical antifatigue character have a promising prospect in microwave magnetic devices and flexible spintronics.
随着人工智能和通信技术的进步，灵活的微波磁性材料对于灵活的微波探测器、可穿戴微波传感器和灵活的自旋电子学变得至关重要。在这里，在外部机械弯曲下，展示了具有高度稳定的面内（IP）铁磁共振（FMR）和可调节的面外（OOP）FMR 特性的柔性微波磁性 LiZnFeO（LZFO）（111）外延薄膜。当样品在外力拉伸或压缩弯曲应变和变形下弯曲时，IP FMR 线宽和共振场（H）基本保持不变。然而，OOP FMR 光谱（包括 H 和吸收峰）可以通过机械弯曲来调节，即 LZFO 样品在外弯曲曲率下具有两个 OOP FMR 吸收峰。同时，LZFO 样品还具有出色的机械抗疲劳和机械保持特性。在具有出色机械抗疲劳特性的同一 LZFO 样品中，高度稳定的 IP 和可调节的 OOP FMR 光谱在微波磁性器件和灵活的自旋电子学方面具有广阔的前景。
