论文标题
相互依赖的木核 - 二极之极在外延铁磁Fe3O4薄膜
Facet-dependent magnon-polarons in epitaxial ferrimagnetic Fe3O4 thin films
论文作者
论文摘要
木核酸是相干混合的准粒子，它来自磁性振动的强磁弹性耦合和磁性材料中的自旋波。最近，镁质 - 桃金素（Magnon-Polarons）引起了很多关注，因为它们为操纵镁质提供了强大的工具，这对于基于木元的旋转器设备至关重要。在这项工作中，我们通过自旋Seebeck效应测量值报告了外在的铁磁性FE3O4薄膜中相依赖的木核 - 核酸龙的实验性观察。 （110）和（（100）面向面向的Fe3O4膜中的木核 - 极光子的临界磁场分别为1.5 t和1.8 t，这是由沿[110]和[100]方向的不同声子速度产生的。随着温度的降低，（110）和（100）面向面向的FE3O4膜的磁杆增强自旋式锯齿电压都会降低，这可能归因于增强的木氧化棒极 - 孔孔在升高的温度下散射的增强。这项工作展示了外延磁性膜中的晶体结构工程，作为操纵磁通岩的有前途的途径，以实现未来的Magnon Spinon Spintronic应用。
Magnon-polarons are coherently mixed quasiparticles that originate from the strong magnetoelastic coupling of lattice vibrations and spin waves in magnetic-ordered materials. Recently, magnon-polarons have attracted a lot of attention since they provide a powerful tool to manipulate magnons, which is essential for magnon-based spintronic devices. In this work, we report the experimental observation of facet-dependent magnon-polarons in epitaxial ferrimagnetic Fe3O4 thin films via spin Seebeck effect measurement. The critical magnetic fields for the magnon-polarons in the (110)- and (100)-oriented Fe3O4 films are 1.5 T and 1.8 T, respectively, which arises from the different phonon velocities along the [110] and [100] directions. As the temperature decreases, the magnon-polarons-enhanced spin Seebeck voltage decreases in both (110)- and (100)-oriented Fe3O4 films, which could be attributed to the enhanced magnon-polarons scattering at elevated temperatures. This work demonstrates the crystal structure engineering in epitaxial magnetic films as a promising route to manipulate the magnon-polarons for future magnon spintronic applications.
