Title :
Magnetism of new semi-Heusler compounds FeVSn and CoVSn
Author :
Lue, C.S. ; Öner, Y. ; Naugle, D.G. ; Ross, Joseph H., Jr.
fDate :
7/1/2001 12:00:00 AM
Abstract :
Magnetic properties of new intermetallics FeVSn and CoVSn are reported. Both materials belong to the group of semi-Heusler compounds, with lattice parameters of 0.593 and 0.598 nm respectively in a cubic MgAgAs structure. X-ray investigations indicate partial atomic ordering in both cases. Ferromagnetic order was observed in FeVSn with Tc =86 K. The saturation moment obtained by M versus H measurements at 4 K has a value of 0.45 Gig, indicating that FeVSn is a weak itinerant ferromagnet. CoVSn was found to be paramagnetic with no magnetic ordering down to 2 K. Room-temperature 51V NMR spectra were used as a local probe of the magnetic behavior of these materials. The results Indicate that V d orbitals play a strong role in the magnetism of FeVSn. Results for CoVSn are consistent with predicted semiconducting or semimetallic behavior for this material
Keywords :
cobalt alloys; ferromagnetic materials; iron alloys; lattice constants; magnetic moments; nuclear magnetic resonance; paramagnetic materials; tin alloys; vanadium alloys; weak ferromagnetism; 2 K; 293 to 298 K; 4 K; 51V NMR spectra; CoVSn; FeVSn; X-ray diffraction; cubic MgAgAs structure; ferromagnetic order; lattice parameters; paramagnet; partial atomic ordering; saturation moment; semi-Heusler compounds; semiconducting behavior; semimetallic behavior; weak itinerant ferromagnet; Atomic measurements; Extraterrestrial measurements; Intermetallic; Lattices; Magnetic materials; Magnetic properties; Magnetic semiconductors; Paramagnetic materials; Saturation magnetization; Semiconductor materials;
Journal_Title :
Magnetics, IEEE Transactions on
