Abstract
Structure and magnetic properties of (Nd 1- x Pr x ) 2Fe 14B 1- y C y compounds with x = 0, 0.2, 0.4, 0.6, 0.8, 1 and y = 0, 0.5, 1 have been studied by X-ray diffraction, ac initial susceptibility measurements and by using the SPD (singular point detection) technique. Compounds with the Nd 2Fe 14B-type structure were found for y = 0, 0.5 and a R 2Fe 17C x phase with R 2Fe 17-type structure exists for y = 1. For y = 0 and 0.5, both the Curie temperature ( T c) and the spin-reorientation temperature ( T sr) decrease with increasing Pr content. Spin reorientations were observed up to x = 0.8. Substitution of carbon for boron results in decrease of T c and T sr, whereas it enhances the uniaxial magnetocrystalline anisotropy field. An anomalous 4f-sublattice-composition dependence of the anisotropy field is found at 290 K for the compositions with y = 0 and 0.5 which may be associated with the valence instability of the Pr ions in these systems. The experimental results show that the substitution of C for B influences the 4f sublattice as well as the 3d sublattice.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
