M. Anagnostou et al., STABILITY RANGE, STRUCTURE AND MAGNETIC-PROPERTIES OF YFE12-XMOX LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-2.0) ALLOYS, Journal of magnetism and magnetic materials, 131(1-2), 1994, pp. 157-166
Intermetallic compounds with the general formula YFe12-xMox (0.5 less-
than-or-equal-to x less-than-or-equal-to 2.0) were prepared by arc Cry
stal structure determination by X-ray powder diffractometry and Rietve
ld refinement techniques has shown that a tetragonal ThMn12 is formed
with small admixture of alpha-Fe only for x < 1.0. Extrapolation of th
e linear dependence of the lattice parameters to x = 0 gives a = 8.472
7 angstrom, c = 4.7682 angstrom and a unit cell volume V = 342.3 angst
rom3. Curie temperatures increase with decreasing x but deviate from l
inear behavior below x = 1.0 leading to an estimate of T(c) = 480 K fo
r the limiting case of x = 0. A more linear dependence on x is observe
d for the saturation magnetization. The extrapolated value for YFe12 i
s approximately 26 mu(B)/f.u. Anisotropy fields at 4.2 K increase from
5 T for x = 0.5 to 7.5 T for x = 1.0. Irreversible phenomena in the t
emperature dependence of magnetization are observed in the x = 2 sampl
e. Hyperfine fields have been determined for the i,j and f sites at ro
om temperature from Mossbauer spectra.