In-situ studies of low-field large magnetostriction in Tb1-xDyxFe2 compounds by synchrotron-based high-energy x-ray diffraction

JOURNAL OF ALLOYS AND COMPOUNDS

卷:658

Article

Nie, Zhihua¹  Yang, Sen²  Wang, Yan-dong³  Wang, Zilong¹  Liu, Dongmei⁴  Ren, Yang⁵  Chang, Tieyan²  Zhang, Rui² 

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

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Sch Sci, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China

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

[4] Gen Res Inst Nonferrous Met, State Key Lab Fabricat & Proc Nonferrous Met, Beijing 100088, Peoples R China

[5] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA

关键词: Magnetostriction;    Laves phase;    X-ray diffraction;    Domain switching;    Lattice distortion;   

DOI  :  10.1016/j.jallcom.2015.10.244

来源: Elsevier

【 摘 要 】

Partial substitution of Dy for Tb in TbFe2 compounds results in improved magnetostriction with high strains obtained at low fields. The structural evolutions of TbFe2 and Tb0.4Dy0.6Fe2 compounds are studied in situ using synchrotron-based high-energy x-ray diffraction under an applied magnetic field. It is found that the rhombohedral distortion in TbFe2 is remarkably reduced by substituting Dy for Tb. When a low magnetic field is applied, a preferential rearrangement of rhombohedral domains is directly evidenced in TbFe2 and Tb0.4Dy0.6Fe2 compounds. Based on the concept of crystallographic domain-switching, the enhancement in the magnetostriction in Tb1-xDyxFe2 compounds is discussed. (C) 2015 Elsevier B.V. All rights reserved.

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