Abstract
Samples of RFe10V2Cx with R=Y, Gd, Dy or Er were prepared by arc melting. X-ray diffraction and thermomagnetic analyses showed that interstitial carbides with the ThMn12 structure can be formed only for a small amount of C (x<or=0.3). The effects of C addition on lattice expansion and Curie temperature are much smaller in the carbides prepared by arc melting than in those prepared by gas-solid reaction. Neutron diffraction shows that the C atoms occupy the interstitial site in the structure.
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