Tanguturi Ranganadha Gopalarao, Tsai Jian-Chen, Li You-Siang, Tsay Jyh-Shen
Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan.
Phys Chem Chem Phys. 2023 Nov 29;25(46):32029-32039. doi: 10.1039/d3cp04463g.
Interfaces of ferromagnetic/organic material hybrid structures refer to the spin interface that governs physical properties for achieving high spin polarization, low impedance mismatch, and long spin relaxation. Spintronics can add new functionalities to electronic devices by taking advantage of the spin degree of freedom of electrons, which makes understanding the dynamic magnetic properties of magnetic films important for spintronic device applications. Our knowledge regarding the magnetic dynamics and magnetic anisotropy of combining ferromagnetic layer and organic semiconductor by microwave-dependent magnetic measurements remains limited. Herein, we report the impact of an organic layer on the dynamic magnetic behavior of nickel/rubrene bilayers deposited on a Si(100) substrate. From magnetic dynamic measurements, opposite signs of effective magnetic fields between the in-plane (IP) and out-of-plane (OP) configurations suggest that the magnetization of Ni()/rubrene/Si prefers to coexist. A shift in OP resonance fields to higher values can mainly be attributed to the enhanced second-order anisotropy parameter K value. Based on IP measurements, a two-magnon scattering mechanism is dominant for thin Ni()/rubrene/Si bilayers. By adding a rubrene layer, the highly stable IP combined with the tunable OP ferromagnetic resonance spectra for Ni()/rubrene/Si bilayers make them promising materials for use in microwave magnetic devices and spintronics with controllable perpendicular magnetic anisotropy.
铁磁/有机材料混合结构的界面是指自旋界面，它控制着物理性质，以实现高自旋极化、低阻抗失配和长自旋弛豫。自旋电子学可以通过利用电子的自旋自由度为电子设备增添新功能，这使得了解磁性薄膜的动态磁性能对于自旋电子器件应用至关重要。我们通过依赖微波的磁性测量对铁磁层与有机半导体结合的磁动力学和磁各向异性的了解仍然有限。在此，我们报告了有机层对沉积在Si(100)衬底上的镍/红荧烯双层膜动态磁行为的影响。从磁动力学测量结果来看，面内（IP）和面外（OP）配置之间有效磁场的相反符号表明Ni()/红荧烯/Si的磁化倾向于共存。OP共振场向更高值的偏移主要可归因于二阶各向异性参数K值的增强。基于IP测量，双磁子散射机制对于薄Ni()/红荧烯/Si双层膜占主导地位。通过添加红荧烯层，Ni()/红荧烯/Si双层膜高度稳定的IP与可调谐的OP铁磁共振光谱使其成为用于具有可控垂直磁各向异性的微波磁性器件和自旋电子学的有前景的材料。
