论文标题
合成反铁磁铁中的大表面声波非年代性
Large surface acoustic wave nonreciprocity in synthetic antiferromagnets
论文作者
论文摘要
我们研究了在铁磁/非磁/非磁性/铁磁试验中的表面声波（锯）的传播。研究了具有各种非磁性间隔厚度的设备，研究了锯散射矩阵，该设备定义了层间交换耦合的强度。我们发现，当两个铁磁层通过抗磁磁耦合时，锯的传输幅度取决于它们的传播方向。这种观察到的非股一度的程度随着交换耦合强度的增加而增加，对于具有最薄的间隔层的设备达到37 dB/mm。这些结果表明，与循环器和隔离器等可行的声学非注册透射装置（例如循环器和隔离器），层间交换偶联的合成反铁磁体的潜力。
We have studied the transmission of surface acoustic waves (SAWs) in ferromagnetic/non-magnetic/ferromagnetic tryilayers. The SAW scattering matrix is studied for devices with various non-magnetic spacer thickness, which defines the strength of the interlayer exchange coupling. We find the SAW transmission amplitude depends on their propagation direction when the two ferromagnetic layers are coupled antiferromagnetically. The degree of such SAW nonreciprocity increases with increasing exchange coupling strength and reaches 37 dB/mm for a device with the thinnest spacer layer. These results show the potential of interlayer exchange coupled synthetic antiferromagnets for viable acoustic nonreciprocal transmission devices, such as circulators and isolators.
