THE CHANGE FROM ANTIFERROMAGNETISM TO FERROMAGNETISM IN GdAg_1-xZn_x

Abstract

The paramagnetic ordering temperature (3 (x) of the intermetallic solid solution GdAgl-,Zn, exhibits a non-linear behaviour with terms up to x4. This is shown to be due to the interaction to the nearest neighbours which changes non-monotonously on replacing A~' + by Zn2+.

Calculations of magnetic transition temperatures of Gd-based compounds

“…We included in the set of studied compounds two ferromagnetic (FM) compounds GdCd and GdZn and three antiferromagnetic compounds GdAg, GdCu and GdTl with CsCl structure. GdAg and GdCu, according to available experimental data [7,8], have propagation vector Q ¼ ð 1 2 ; 1 2 ; 0Þ (in units of 2p=a), therefore their magnetic unit cell is tetragonal. The propagation vector of the magnetic structure of GdTl is not known.…”