Samples of Nd2Fe17-xTxCy with T=V, Nb, Cr, and Zr were prepared by melting of the constituent elements including C and studied by neutron diffraction. Comparing with their uncarbided counterparts, we found that the substituents transfer, more or less, from the 6c site to the 18f and 18h sites with the introduction of C atoms. This behavior appears to relate to the electronegativities between the C atoms and the early transition series elements because the 18f and 18h sites are near neighbors of the interstitial C site. However, the C effects in the V. Nb. Cr, and Zr samples are not as strong as those in Ti samples. SQUID measurements show that the Curie temperatures of these samples depend on both the interstitial C atoms and the substituents.
H. Luo et al., "Studies of V, Nb, Cr, and Zr Substituted 2:17 Compounds and their Carbides using Neutron Diffraction," Journal of Applied Physics, vol. 81, no. 8, pp. 4542-4544, American Institute of Physics (AIP), Apr 1997.
The definitive version is available at https://doi.org/10.1063/1.365421
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© 1997 American Institute of Physics (AIP), All rights reserved.
15 Apr 1997