Magnetic properties, magnetic structure of GdMg and TbMg compounds

The magnetic properties of GdMg and TbMg, as well as the magnetic structure of TbMg have been investigated by neutron diffraction. Both compounds have a non-colinear magnetic structure with a ferromagnetic component. In GdMg, the spontaneous magnetization reaches 4.54μsub(B) at 4.2 K and decreases as T2. For TbMg at 4.2 K, the ferromagnetic component and the antiferromagnetic component perpendicular to the propagation vector (1/2 0 0) are nearly equal to 5.17μsub(B). (author)