Structural investigations of Fe-Ga alloys by high-energy x-ray diffraction

JOURNAL OF ALLOYS AND COMPOUNDS

卷:763

Article

Nie, Zhihua¹  Wang, Zilong¹  Liang, Yanbin¹  Cong, Daoyong²  Li, Gaoqiang¹  Zhu, Cheng¹  Tan, Chengwen¹  Yu, Xiaodong¹  Ren, Yang³  Wang, Yandong² 

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[3] Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA

关键词: High-energy x-ray diffraction;    Crystal structure;    Magnetostriction;    Fe-Ga;    Superlattice;   

DOI  :  10.1016/j.jallcom.2018.05.327

来源: Elsevier

【 摘 要 】

The magnetostriction of Fe-Ga alloys is significantly affected by the Ga content, which displays two positive peaks with increasing Ga concentration. This work presents a systematic structural investigation of rapidly-cooled Fe-Ga alloys by the synchrotron-based high-energy x-ray diffraction. Ga-rich clusters are evidenced for the alloys beyond the first magnetostriction peak, which is identified by the anomalous peak broadening for the (200) fundamental reflection and a shrink of lattice parameter. The generation of Ga-rich clusters in A2 matrix results in the sudden decrease of magnetostriction after the first magnetostriction peak. These findings are important for designing high-performance Fe-Ga magnetostrictive alloys by structural tuning. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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