CAJ | 학술논문

文章简要介绍了材料科学研究中被广泛应用的透射电子显微(TEM)技术及其在多铁材料研究中的应用，并给出了几个典型案例：利用球差矫正原子分辨扫描透射电子显微术(STEM)，并和电子能量损失谱(EELS)相结合，分析多铁异质结界面处的原子分布、离子价态和化学键的变化；结合球差矫正原子分辨透射电子显微图像(HRTEM)和STEM图像，分析多铁材料中的局域对称性破缺和电极化特性；利用原位变温及电/磁场加载技术，研究多铁材料中的结构相变和电畴/磁畴的动态演变特性。文章特别指出，现代透射电子显微学是全面分析理解多铁材料局域微结构，探讨多铁耦合机制及其物理根源的有效手段。
문장간요개소료재료과학연구중피엄범응용적투사전자현미(TEM)기술급기재다철재료연구중적응용，병급출료궤개전형안례：이용구차교정원자분변소묘투사전자현미술(STEM)，병화전자능량손실보(EELS)상결합，분석다철이질결계면처적원자분포、리자개태화화학건적변화；결합구차교정원자분변투사전자현미도상(HRTEM)화STEM도상，분석다철재료중적국역대칭성파결화전겁화특성；이용원위변온급전/자장가재기술，연구다철재료중적결구상변화전주/자주적동태연변특성。문장특별지출，현대투사전자현미학시전면분석리해다철재료국역미결구，탐토다철우합궤제급기물리근원적유효수단。
Recent progress of a variety of modern transmission electron microscopy (TEM) techniques and their applications to multiferroic materials are briefly reviewed. It is empha-sized that numerous significant structural issues in multiferroic material science could be well ad-dressed by means of TEM-based techniques. For instance, atomic-resolution scanning transmis-sion electron microscopy (STEM) and electron energy-loss spectroscopy (EELS) are invaluable for determining the atomic structure, valence states and electronic structure of the controllable in-terface in multiferroic heterostructures. High-quality high-resolution TEM and STEM images with spatial resolution better than 1 ? ensure the direct observation of local dipoles and mapping of the polarization field. The new generation TEM facilities combined with in-situ cooling/heating and electric/magnetic field holders allow us to capture the dynamic characteristics of the atomic struc-ture and ferroelectric/magnetic domains and to understand the interaction between different order parameters, which will provide valuable insight into the physical origin of the coupling mecha-nism in multiferroics.