Guslienko Konstantin Yu, Hoffmann Axel
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Phys Rev Lett. 2006 Sep 8;97(10):107203. doi: 10.1103/PhysRevLett.97.107203. Epub 2006 Sep 6.
We developed an analytical model for the magnetization reversal via vortex nucleation and annihilation in double-layer ferromagnetic/antiferromagnetic cylindrical dots. The coupling of the ferromagnet to the antiferromagnet is modeled by means of an interfacial exchange field. The nonuniformity of the magnetization reversal mode perpendicular to the layers is explicitly included and results in a tilted vortex core (tilted Bloch line). The vortex core tilt results in an asymmetry of the nucleation and annihilation fields, which are calculated as a function of the dot geometry.
我们开发了一个用于双层铁磁/反铁磁圆柱点中通过涡旋成核和湮灭实现磁化反转的分析模型。铁磁体与反铁磁体之间的耦合通过界面交换场进行建模。明确考虑了垂直于层的磁化反转模式的不均匀性，这导致了涡旋核心倾斜（倾斜的布洛赫线）。涡旋核心倾斜导致成核场和湮灭场的不对称性，它们作为点几何形状的函数进行计算。
