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Structural and magnetic properties of DyCo4−xFexGa compounds

Published online by Cambridge University Press:  06 March 2012

W. H. Zhang ,
J. Q. Li ,
Y. J. Yu ,
F. S. Liu ,
W. Q. Ao  and
J. L. Yan
W. H. Zhang
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China and Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 53004, People’s Republic of China
J. Q. Li*
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China and Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 53004, People’s Republic of China
Y. J. Yu
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China and Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 53004, People’s Republic of China
F. S. Liu
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China and Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 53004, People’s Republic of China
W. Q. Ao
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China and Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 53004, People’s Republic of China
J. L. Yan
Affiliation:
College of Materials Science and Engineering, Guangxi University, Nanning, 530004, People’s Republic of China; Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004, People’s Republic of China
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

The structural and magnetic properties of the DyCo4−xFexGa compounds with x=0, 0.5, 1, and 1.5 have been investigated by X-ray diffraction and magnetic measurements. Powder X-ray diffraction analysis reveals that each of the DyCo4−xFexGa compounds has a hexagonal CaCu5-type structure (space group P6/mmm). The Fe solubility limit in DyCo4−xFexGa is x<1.5. The higher the value of x, the larger the unit-cell parameters a, c, V, and the 3d-sublattice moment but the smaller the 3d uniaxial anisotropy. Magnetic measurements show that the Curie temperature of DyCo4−xFexGa increases from 498 K for x=0 to 530 K for x=1.5, the compensation temperature Tcomp decreases from 286 K for x=0 to 238 K for x=1.5, and the spin-reorientation transition temperature increases from 403 K for x=0 to 530 K for x=0.5. No spin-reorientation transition was found in the samples with x=1.0 and 1.5. The saturation magnetization of DyCo4−xFexGa measured at 173 K increases but the magnetization measured at 300 K decreases with increasing Fe content x.

Keywords

transition metal compoundscrystal structuremagnetic properties
Type
Technical Articles
Information
Powder Diffraction , Volume 25 , Supplement S1 , September 2010 , pp. S31 - S35
Copyright
Copyright © Cambridge University Press 2010

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