中国物理B ›› 2018, Vol. 27 ›› Issue (2): 26101-026101.doi: 10.1088/1674-1056/27/2/026101
所属专题: Virtual Special Topic — Magnetism and Magnetic Materials
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Yong Li(李勇), Xue-Fang Dai(代学芳), Guo-Dong Liu(刘国栋), Zhi-Yang Wei(魏志阳), En-Ke Liu(刘恩克), Xiao-Lei Han(韩小磊), Zhi-Wei Du(杜志伟), Xue-Kui Xi(郗学奎), Wen-Hong Wang(王文洪), Guang-Heng Wu(吴光恒)
Yong Li(李勇)1,2, Xue-Fang Dai(代学芳)1, Guo-Dong Liu(刘国栋)1, Zhi-Yang Wei(魏志阳)2, En-Ke Liu(刘恩克)2, Xiao-Lei Han(韩小磊)3, Zhi-Wei Du(杜志伟)3, Xue-Kui Xi(郗学奎)2, Wen-Hong Wang(王文洪)2, Guang-Heng Wu(吴光恒)2
摘要:
The structural, magnetic properties, and electronic structures of hexagonal FeCoSn compounds with as-annealed bulk and ribbon states were investigated by x-ray powder diffraction (XRD), differential scanning calorimetry (DSC), transmission electron microscope (TEM), scanning electron microscope (SEM), magnetic measurements, and first-principles calculations. Results indicate that both states of FeCoSn show an Ni2In-type hexagonal structure with a small amount of FeCo-rich secondary phase. The Curie temperatures are located at 257 K and 229 K, respectively. The corresponding magnetizations are 2.57 μB/f.u. and 2.94 μB/f.u. at 5 K with a field of 50 kOe (1 Oe=79.5775 A·m-1). The orbital hybridizations between 3d elements are analyzed from the distribution of density of states (DOS), showing that Fe atoms carry the main magnetic moments and determine the electronic structure around Fermi level. A peak of DOS at Fermi level accounts for the presence of the FeCo-rich secondary phase. The Ni2In-type hexagonal FeCoSn compound can be used during the isostructural alloying for tuning phase transitions.
中图分类号: (X-ray diffraction)