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Structure and Magnetic Properties of Nd-Co-Fe-Si-C Intermetallics

Published online by Cambridge University Press:  14 March 2011

Monica Sorescu ,
A. Grabias  and
M. Valeanu
Monica Sorescu
Affiliation:
Duquesne University, Bayer School of Natural and Environmental Sciences, Physics Department, Pittsburgh, Pennsylvania 15282, U. S. A.
A. Grabias
Affiliation:
Duquesne University, Bayer School of Natural and Environmental Sciences, Physics Department, Pittsburgh, Pennsylvania 15282, U. S. A.
M. Valeanu
Affiliation:
Institute of Atomic Physics, National Institute of Materials Physics, R 76900 Bucharest, Romania
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Abstract

Intermetallics of the type Nd2Co15−xFexSi2Cy (x=7; 9; 12 and y=0; 1) were prepared by arc melting in order to study the competing effects of Fe and Co substitutions on the magnetic hyperfine fields as well as the effects of interstitial carbon additions on the symmetry and local magnetic properties in these systems. The investigations were performed by x-ray diffraction, Mössbauer spectroscopy and hysteresis loop measurements. Both site and average hyperfine magnetic field values were analyzed in order to discriminate between the Fe and Co contributions to the local atomic environments in these systems. While a higher Fe content as well as a higher Co content can both lead to an increase in the site magnetic fields, it was found that the model based on hyperfine field distributions provides a better description of the trends observed in hyperfine magnetic fields in these compounds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 614: Symposium F – Magnetic Materials, Structures & Processing for Information… , 2000 , F8.4.1
Copyright
Copyright © Materials Research Society 2000

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References

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