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Diffusion of Carbon into RE2Fe17(RE=RARE Earth) Lattice: A High Temperature Approach

Published online by Cambridge University Press:  10 February 2011

M. Venkatesan ,
U.V. Varadaraju  and
K.V.S. Rama Rao
M. Venkatesan
Affiliation:
Materials Science Research Centre
U.V. Varadaraju
Affiliation:
Materials Science Research Centre
K.V.S. Rama Rao
Affiliation:
Magnetism and Magnetic Materials Laboratory, Department of PhysicsIndian Institute of Technology, MADRAS 600 036, INDIA.
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Abstract

The interstitial carbides HoErFe15Ga2Cy (y=0,0.5,1.0,1.5,2.0) were synthesized by are melting technique and characterized by X-ray diffraction and magnetization measurements. The hexagonal Th2Ni17 type structure persisted in all compounds. Both the Curie temperature TC and unit cell volume v are found to increase monotonically with increasing carbon concentration. The unit cell volume increase of Ga substituted carbide HoErFe15Ga2C2.0 is around 6.1% compared to HoErFe17. The Curie temperature increase is mainly due to the strengthening of exchange interaction. The Ga substitution is found to not only help the formation of single phase but also enhance the uniaxial anisotropy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 527: Symposium Z – Diffusion Mechanisms in Crystalline Materials , 1998 , 87
Copyright
Copyright © Materials Research Society 1998

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References

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