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MAGNETIC TRANSITION TEMPERATURES OF INTERMETALLIC COMPOUNDS OF RARE EARTH WITH COBALT AND IRON.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The Curie temperature Tc of over fifty intermetallic compounds of the R2Fe17, R6Fe23, RFe3, RFe2, RCo5, and R2Co7 series was determined R is a rare earth or yttrium. Initial permeability vs temperature curves obtained from a small ac field were used to determine Tc. In the R-Fe series Tc ranged from -182C Ce2Fe17 through a maximum of 520C GdFe2 to -38C Lu2Fe17. The Curie temperature of Ce-, Pr-, Nd-, Sm-, and Y-Co5 ranged from 374C CeCo5 to 724C SmCo5. The R2Co7 series ranged from a Tc of -122C Ce2Co7 through a peak of 489C Gd2Co7 to 186C Lu2Co7. Author
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