New rare‐earth intermetallic phases R3(Fe,M)29Xn: (R=Ce, Pr, Nd, Sm, Gd; M=Ti, V, Cr, Mn; and X=H, N, C) (invited)

Autor:	R. L. Davis, J. B. Dunlop, S. J. Collocott, Hong-Shuo Li, A. Margarian, J. M. Cadogan, D. H. Ryan
Rok vydání:	1994
Předmět:	Crystallography Materials science Metallurgy Intermetallic General Physics and Astronomy Curie temperature Crystal structure Nitride Coercivity Ternary operation Monoclinic crystal system Carbide
Zdroj:	Journal of Applied Physics. 76:6138-6143
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.358333
Popis:	New rare‐earth (R), iron‐rich ternary intermetallic compounds of the form R3(Fe,M)29 with the monoclinic Nd3(Fe,Ti)29 structure (space group P21/c, ♯14, Z=2) have recently been shown to form with R=Ce, Nd, Pr, Sm, and Gd, and M=Ti, V, Cr, and Mn. This novel structure is derived from the alternate stacking of Th2Zn17 and ThMn12‐type segments and contains two R sites and fifteen Fe(M) sites. Reported Curie temperatures of the 3:29 compounds range from 296 K (R=Ce, M=Cr) to 524 K (R=Sm, M=V). The 3:29 compounds all show improved magnetic properties after interstitial modification with H or N; in particular, room‐temperature coercivity has been reported in Sm3(Fe,Ti)29N5, making this compound a candidate for possible permanent‐magnet applications. In this article we will review the work carried out to date on the 3:29 compounds.
Databáze:	OpenAIRE
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