论文标题
在几乎补偿铁石榴石中的界面磁层的巨大拓宽
Giant widening of interface magnetic layer in almost compensated iron garnet
论文作者
论文摘要
两种公共的Ferrimagnet在沿易于磁化方向定向的磁场处从共线到倾斜磁相的过渡。在这项工作中，我们在薄膜中通过磁光法拉第的磁光效果来研究过渡（lu $ _ {3 - {\ rm {x}}} $ bi $ $ _ {\ rm {x}}} $）（fe $ _ {5- {\ rm {y} } - {\ rm {z}}} $ ga $ _ {\ rm {y}} $ al $ _ {\ rm {z}} $）o $ _ {12} $在gd $ _3 $ ga $ _5 $ o $ _ {12} $ bistrate上生长。在补偿温度的附近，观察到具有复杂形状的过渡的前体。使用厚度可变的特殊样品，我们证明了前体的界面起源。从底物扩散到膜中，形成了一个薄的粘合层，并具有增强的磁化。它在膜中诱导了扩展的不均匀磁性结构。由于磁性磁层的易于平面各向异性，因此出现了前体的两步形状。我们强调，在接近补偿温度的同时，薄膜中不均匀磁化分布的有效宽度大大增长。
A two-sublattice ferrimagnet undergoes a transition from a collinear to canted magnetic phase at magnetic field oriented along an easy magnetization direction. In this work, we study the transition by means of the magneto-optical Faraday effect in a thin film of compensated iron garnet (Lu$_{3-{\rm{x}}}$Bi$_{\rm{x}}$)(Fe$_{5-{\rm{y}}-{\rm{z}}}$Ga$_{\rm{y}}$Al$_{\rm{z}}$)O$_{12}$ grown on Gd$_3$Ga$_5$O$_{12}$ substrate. In the immediate vicinity of the compensation temperature a precursor of the transition with a complex shape was observed. Using a special sample with variable thickness we demonstrate an interfacial origin of the precursor. Diffusion of gadolinium from the substrate into the film forms a thin intermixed layer with enhanced magnetization. It induces an extended inhomogeneous magnetic structure in the film. A two-step shape of the precursor appears due to an easy-plane anisotropy of the intermixed magnetic layer. We emphasize that an effective width of the inhomogeneous magnetization distribution in the film grows enormously while approaching the compensation temperature.
