MAGNETIC-PROPERTIES OF NEW SERIES R-MO-FE NITRIDES WITH THE THMN12-TYPE STRUCTURE AT A LOWER MO CONTENT

A systematic study has been made on formation condition, crystallograp hic structure and magnetic properties of RMo1.5Fe10.5Nx, where R=Y, Ce , Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er. The interstitial nitrogen atom effec ts on Curie temperature, saturation magnetization and magneto-crystall ine anisotropy have been investigated. Two important preliminary resul ts have been obtained. (1) A single phase crystallized in the ThMn12-t ype structure was stabilized with a smaller content of molybdenum, thu s, the compounds possess a higher Curie temperature and a larger spont aneous magnetization. (2) A complete system of compounds with 1:12 typ e structure containing the light rare earth cerium and praseodymium wa s synthesized, which will be favorable for developing new rare earth h ard magnetic materials.