Stöger-Pollach Michael, Ederer Manuel
University Service Center for Transmission Electron Microscopy (USTEM), Technische Universität Wien, Wiedner Hauptstraße 8-10, Wien 1040, Austria; Institute of Solid State Physics, Technische Universität Wien, Wiedner Hauptstraße 8-10, Wien 1040, Austria.
University Service Center for Transmission Electron Microscopy (USTEM), Technische Universität Wien, Wiedner Hauptstraße 8-10, Wien 1040, Austria; Institute of Solid State Physics, Technische Universität Wien, Wiedner Hauptstraße 8-10, Wien 1040, Austria.
Micron. 2024 Oct;185:103687. doi: 10.1016/j.micron.2024.103687. Epub 2024 Jul 4.
In the present study we investigate the CoO/CoO interface in order to determine its intriguing magnetic behavior, which can be utilized for tailoring magnetic properties, enabling spin transport, enhancing magnetic coupling, tuning device functionalities, and realizing miniaturized magnetic devices for various technological applications. We decipher the magnetic properties of the CoO/CoO interface from first principles calculations using Wien2k and probe them experimentally by employing electron energy-loss magnetic chiral dichroism (EMCD), which is an electron-energy loss spectrometry (EELS) based technique in the transmission electron microscope (TEM). Both, theory and experiment, are in perfect agreement and result in a ferromagnetic 2D-electron gas of 5Å thickness directly at the interface.
在本研究中，我们对CoO/CoO界面进行了研究，以确定其引人入胜的磁行为，这种磁行为可用于定制磁性能、实现自旋输运、增强磁耦合、调整器件功能以及实现适用于各种技术应用的小型化磁器件。我们通过使用Wien2k进行第一性原理计算来解析CoO/CoO界面的磁性能，并通过采用电子能量损失磁圆二色性（EMCD）进行实验探测，EMCD是一种基于透射电子显微镜（TEM）中的电子能量损失谱（EELS）的技术。理论和实验两者完全吻合，结果表明在界面处直接形成了厚度为5Å的铁磁二维电子气。
