Kobayashi Nobukiyo, Masumoto Hiroshi, Takahashi Saburo, Maekawa Sadamichi
Research Institute for Electromagnetic Materials, 2-1-1, Yagiyama-minami, Taikaku-ku, Sendai 982-0807, Japan.
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 6-3, Aramaki aza Aoba, Aoba-ku, Sendai 980-8578, Japan.
Sci Rep. 2016 Sep 28;6:34227. doi: 10.1038/srep34227.
Developing optically transparent magnets at room temperature is an important challenge. They would bring many innovations to various industries, not only for electronic and magnetic devices but also for optical applications. Here we introduce FeCo-(Al-fluoride) nanogranular films exhibiting ferromagnetic properties with high optical transparency in the visible light region. These films have a nanocomposite structure, in which nanometer-sized FeCo ferromagnetic granules are dispersed in an Al-fluoride crystallized matrix. The optical transmittance of these films is controlled by changing the magnetization. This is a new type of magneto-optical effect and is explained by spin-dependent charge oscillation between ferromagnetic granules due to quantum-mechanical tunneling.
在室温下开发光学透明磁体是一项重大挑战。它们将给各个行业带来诸多创新，不仅适用于电子和磁性设备，还适用于光学应用。在此，我们介绍了FeCo-(氟化铝)纳米颗粒薄膜，其在可见光区域具有高光学透明度并展现出铁磁特性。这些薄膜具有纳米复合结构，其中纳米尺寸的FeCo铁磁颗粒分散在氟化铝结晶基质中。这些薄膜的光学透射率可通过改变磁化强度来控制。这是一种新型的磁光效应，可由量子力学隧穿导致的铁磁颗粒间自旋相关电荷振荡来解释。
