磁性薄膜中磁子-磁子及磁子-自旋结构强耦合机制的研究

腔自旋电子学是一门新兴的交叉学科，研究谐振腔中的光子、固态材料中的自旋元激发（如磁子，自旋结构），以及两者之间的强耦合作用。自旋元激发与腔光子之间的强耦合，可以将量子信息和量子光学的发展与自旋电子学紧密连接起来。目前，磁子-光子之间的强耦合已经被理论和实验验证，自旋结构-光子之间的强耦合也有尝试性的理论研究。我们不禁要问自旋元激发之间是否也能发生强耦合，例如：磁子-磁子强耦合，磁子-自旋结构强耦合。但是，目前对于磁子-磁子、磁子-自旋结构强耦合的研究还非常少，尤其是磁子-自旋结构强耦合的研究还没有报道。在该申请项目中，我们将主要研究磁子-磁子强耦合、磁子-自旋结构强耦合的现象。项目研究内容包括三个方面：(1)单层薄膜磁性纳米结构中的膜内磁子-磁子强耦合现象研究；(2)人工合成反铁磁多层膜中的膜间磁子-磁子强耦合现象研究；(3)单层、多层薄膜磁性纳米结构中磁子-自旋结构强耦合现象研究。

Cavity spintronics is an emerging field of studying the interaction between the photon confined in microwave cavity and the spin collective excitations in solid materials. The strong coupling between photon and spin excitations serves as a bridge between spintronics and the development of quantum information，quantum computing and quantum optics. The magnon-photon strong coupling has been demonstrated theoretically and experimentally, while the spin texture-photon strong coupling has been tentatively studied on theory only. An open question is whether these magnetic excitations can strongly couple themselves without the necessary of involving non-magnetic matter excitations. However, the strong coupling between magnons and spin textures has been rarely studied. In this project, we will focus on the interactions between magnons and spin textures in the strong coupling regime. The following three tasks will be carried out: (1) intralayer magnon-magnon strong coupling in magnetic nanostructures; (2) interlayer magnon-magnon strong coupling in synthetic antiferromagnetic multilayers of both in-plane and out-of-plane magnetic anisotropy; (3) strong mangon-spin textures coupling in nanostructured magnetic single- and multi-layers.