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Structure, spin reorientation and Mossbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys
Zheng Xiaoping; Zhang Peifeng; Fan Duowang; Li Fashen; Hao Yuan
2006-04
发表期刊SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY
ISSN1672-1799
卷号49期号:2页码:149-157
摘要The effect of Al substitution for Fe on crystal structure, magnetostriction and spontaneous magnetostriction, anisotropy and spin reorientation of a series of polycrystalline Tb0.3Dy0.7(Fe1-xAlx)(1.95) alloys (x = 0, 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, 0.35) at room temperature and 77 K was investigated systematically. It was found that the primary phase of Tb0.3Dy0.7(Fe1-xAlx)(1.95) is the MgCu2-type cubic Laves phase structure when x < 0.4 and the lattice constant a of Tb0.3Dy0.7(Fe1-xAlx)(1.95) increases approximately and monotonically with the increase of x. The substitution of Al leads to the fact that the magnetostriction lambda inceases slightly in a low magnetic field (H <= 40 kA/m), but decreases sharply and is easily close to saturation in a high applied field as x increases, showing that a small amount of Al substitution is beneficial to a decrease in the magnetocrystalline anisotropy. It was also found that the spontaneous magnetostriction lambda(111) decreases greatly with x increasing. The analysis of the Mossbauer spectra indicated that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry with the changes of composition and temperature, namely spin reorientation. A small amount of non-magnetic phase exists for x = 0.15 in Tb0.3Dy0.7Fe1-xAlx)(1.95) alloys and the alloys become paramagnetic for x > 0. 15 at room temperture, but at 77 K the alloys still remain magnetic phase even for x = 0.2. At room temperature and 77 K, the hyperfine field decreases and the isomer shifts increase with Al concentration increasing.
关键词magnetostriction cubic Laves phase spin reorientation Mossbauer
DOI10.1007/s11433-006-0149-5
收录类别SCI
语种英语
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000237493900002
出版者SCIENCE PRESS
引用统计
文献类型期刊论文
条目标识符https://ir.lut.edu.cn/handle/2XXMBERH/35701
专题兰州理工大学
材料科学与工程学院
通讯作者Zheng Xiaoping
作者单位1.Lanzhou Jiaotong Univ, Minist Educ, Key lab Optoelect Technol & Intelligenet Control, Lanzhou 730070, Peoples R China
2.Lanzhou Teachers Coll, Inst Elect Informat Sci & Technol, Lanzhou 730070, Peoples R China
3.Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
4.Lanzhou Univ Technol, State Key Lab Adv Nonferrous Mat, Lanzhou 730050, Peoples R China
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GB/T 7714
Zheng Xiaoping,Zhang Peifeng,Fan Duowang,et al. Structure, spin reorientation and Mossbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys[J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,2006,49(2):149-157.
APA Zheng Xiaoping,Zhang Peifeng,Fan Duowang,Li Fashen,&Hao Yuan.(2006).Structure, spin reorientation and Mossbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys.SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,49(2),149-157.
MLA Zheng Xiaoping,et al."Structure, spin reorientation and Mossbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys".SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY 49.2(2006):149-157.
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