Y. Khan et al., STRUCTURE AND MAGNETIC-PROPERTIES OF ND(FEB)N FOR 2-LESS-THAN-N-LESS-THAN-8 - EVIDENCE OF EIGEN CURIE-TEMPERATURE MAGNETIC SUBLATTICES, Physica status solidi. a, Applied research, 142(2), 1994, pp. 499-508
The crystalline Nd(FeB), compounds, obtained by crystallizing the melt
-quenched amorphous counterparts, form solid solutions of the NdCo4B4-
type Structure and are commensurate for n < 4, whereas these are incom
mensurate for n greater-than-or-equal-to 4, the incommensurability inc
reasing with increasing n. The crystal structure of these materials ca
n be described by the space group P4BAR, and is made up of two magneti
cally weakly coupled, eigen Curie temperature magnetic sublattices, on
e body centered tetragonal containing only Nd atoms (Curie temperature
of the order of 14 to 18 K) and the other primitive tetragonal contai
ning only Fe and B atoms (Curie temperature of the order of 938 K). Th
e magnetic ordering of the Fe-B sublattice takes place after completio
n of Fe-Fe links on increasing Nd vacancies with increasing n.