Magnetism of Antiphase Boundaries in Ordered Alloys Studied using Electron Holography
Magnetism of Antiphase Boundaries in Ordered Alloys Studied using Electron Holography
复制标题
使用电子全息术研究有序合金中反相边界的磁性
DOI：
10.1016/j.jmmm.2021.168406
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Y. Murakami
中科院分区：
文献类型：
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作者：
T. Tamaoka;R. Aso;Y. Murakami
利用电子全息术研究了有序晶体中反相晶界（APBs）的磁异常。对于许多有序晶体，包括具有Heusler型结构的Ni50Mn25Al12.5Ga12.5合金，APB区域（显示有限厚度）中的原子无序使铁磁自旋有序性劣化。这种关系有几个功能，如通过APB钉扎磁畴壁。然而，在具有B2型（CsCl型）有序结构的Fe70A130合金中，可通过APBs产生铁磁性。在Fe70A130合金中观察到的异常关系可以为工程上的APB诱导现象提供有用的信息。本文综述了这两种合金的电子全息观察，以及APB研究的技术进展。
Magnetic anomalies in antiphase boundaries (APBs), which are a type of planar defect produced in ordered crystals, have been studied using electron holography. For many ordered crystals, including a Ni50Mn25Al12.5Ga12.5alloy with a Heusler-type structure, atomic disordering in the APB region (showing a finite thickness) deteriorates the ferromagnetic spin order. This relationship has several functions, such as the pinning of magnetic domain walls by APBs. However, in an Fe70A130alloy with a B2-type (CsCl-type) ordered structure, ferromagnetism can be developed by APBs. The unusual relationship observed in the Fe70A130alloy can provide useful information for engineering APB-induced phenomena. This paper reviews recent electron holography observations from these two types of alloys, and technical advancements in the APB studies.