We report magnetic properties of electrospun multiferroic nanofibers assembled into linear aggregates with an external magnetic field, and measured with the magneto-optical Kerr effect (MOKE) in a non-specular or scattering geometry (ScMOKE). Compared with bulk magnetometry, ScMOKE’s sensitivity to subtle differences between aggregates offers a route to determine local multiferroic coupling in disordered nanomaterials. CoFe 2 O 4 -BaTiO 3 nanofiber agglomerates are assembled prior to measurement by suspending and aligning the fibers in a transparent air-cured polyvinyl alcohol solution. We detect the polarization change in light scattered from the fibers, collected at an off-specular angle in order to eliminate the background caused by substrate reflection. Averaged hysteresis loops from different agglomerates show a variety of unique structures. For our optical spot size of ∼15 ##IMG## [http://ej.iop.org/images/0022-3727/53/19...]

中文翻译：

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用分散的磁光克尔效应测量对准的多铁性Janus纳米纤维团聚物的磁性

我们报告了静电纺多铁纳米纤维组装成具有外部磁场的线性聚集体的磁性能，并在非镜面或散射几何形状（ScMOKE）中利用磁光克尔效应（MOKE）进行了测量。与体磁法相比，ScMOKE对聚集体之间细微差异的敏感性为确定无序纳米材料中的局部多铁耦合提供了一条途径。在测量之前，通过在透明的空气固化聚乙烯醇溶液中悬浮和排列纤维，组装CoFe 2 O 4 -BaTiO 3纳米纤维团聚物。我们检测从光纤散射的光的偏振变化，这些光以镜面外的角度收集，以消除由基板反射引起的背景。来自不同附聚物的平均磁滞回线显示出各种独特的结构。