Abstract
The magnetic properties of the CsCl-type compound TbMg have been studied by means of neutron diffraction and magnetization measurements. At 4.2 K the magnetic structure consists of a magnetic unit cell, which is twice as long in one of the cube directions as the crystallographic cell ( a, a, 2 a). The magnetic structure entails an antiferromagnetic component perpendicular to the propagation vector [001] as well as a ferromagnetic component. The magnitudes of these components are 4.5 and 5.1 μ B per Tb atom, respectively. The temperature dependence of the ferromagnetic and antiferromagnetic components were studied in the range 4.2–300 K and were found to behave analogously. Magnetization measurements showed that large thermomagnetic history effects are present in TbMg. At 4.2 K the magnetization shows an appreciable hysteresis.
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