Crystal structure and electrical resistivity studies of Gd(Fe 1− x Co x ) 2 intermetallics

• Published in: Journal of alloys and compounds Vol. 433; no. 1; pp. 53 - 58
• Main Authors: Onak, M., Guzdek, P., Stoch, P., Chmist, J., Bednarski, M., Pańta, A., Pszczoła, J.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-05-2007; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal structure; Curie temperatures; Electrical and thermal conduction in crystalline metals and alloys; Electrical resistivity; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Intermetallics; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Physics; 61.10.Nz; Curie temperatures; Electrical resistivity; 72.15.Eb; 71.20.Be; 71.20.Eh; 71.20.Lp; 75.50.Gg; Intermetallics; 76.30.Kg; Crystal structure; Electrical conductivity; Curie point; Intermetallic compounds; Intermetallics; Crystal structure; Electrical resistivity; Curie temperatures; Iron alloys; XRD; Residual resistivity; Gadolinium alloys; Temperature effects; Chemical composition; 61.10.Nz; 71.20.Be; 71.20.Eh; 71.20.Lp; 72.15.Eb; 75.50.Gg; 76.30.Kg; Carrier density; Cobalt alloys; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.06.089

From X-ray analysis (295 K) it was found that the cubic,
MgCu
2
-type,
F
d
3
m
crystal structure appears across the Gd(Fe
1−
x
Co
x
)
2 series. Electrical resistivity measurements for the Gd(Fe
1−
x
Co
x
)
2 intermetallics were performed in a wide temperature region and the parameters characterizing the resistivity dependence on temperature and composition were determined. The differential of the electrical resistivity against temperature was used to estimate Curie temperatures. The Curie temperature versus
x, high and moderately increasing in the iron-rich area, rapidly drops in the cobalt-rich region. The obtained results are compared with the data known for the Dy(Fe
1−
x
Co
x
)
2 series. The Curie temperature is related to both the number of 3d electrons and the de Gennes factor.