National Institute for Materials Science, Tsukuba, 305-0047, Japan.
Japan Atomic Energy Agency, Tokai, 319-1195, Japan.
Sci Rep. 2023 Jun 6;13(1):9184. doi: 10.1038/s41598-023-36376-x.
Magnetic components are key parts of energy conversion systems, such as electric generators, motors, power electric devices, and magnetic refrigerators. Toroidal inductors with magnetic ring cores can be found inside such electric devices that are used daily. For such inductors, magnetization vector M is believed to circulate with/without distribution inside magnetic cores as electric power was used in the late nineteenth century. Nevertheless, notably, the distribution of M has never been directly verified. Herein, we measured a map of polarized neutron transmission spectra for a ferrite ring core assembled on a familiar inductor device. The results showed that M circulates inside the ring core with a ferrimagnetic spin order when power is supplied to the coil. In other words, this method enables the multiscale operando imaging of magnetic states, allowing us to evaluate the novel architectures of high-performance energy conversion systems using magnetic components with complex magnetic states.
磁性元件是能量转换系统的关键部件，例如发电机、电动机、电力电子设备和磁制冷机。在 19 世纪后期，人们在这些日常使用的电子设备中发现了带有磁环芯的环形电感器。对于这些电感器，人们认为在使用电力时，磁化矢量 M 会在磁芯内部无分布或有分布地循环。然而，值得注意的是，M 的分布从未被直接验证过。在此，我们测量了组装在常见电感器装置上的铁氧体环形磁芯的极化中子传输光谱的图谱。结果表明，当线圈通电时，M 会沿着环形磁芯以铁磁自旋顺序循环。换句话说，这种方法实现了磁性状态的多尺度原位成像，使我们能够使用具有复杂磁性状态的磁性元件来评估高性能能量转换系统的新架构。
