Field-induced transitions of the intermetallic compound DyMn 2Ge 2

Abstract

The magnetization of the free-powdered intermetallic compound DyMn 2Ge 2 has been studied in steady (up to 12 T) and pulsed magnetic fields (up to 50 T) in the temperature range between 7 and 70 K. Several new field-induced magnetic phase transitions are observed, and the magnetic phase diagram in the field-temperature plane is constructed. In contrast with the single crystal, the free-powdered sample is found to exhibit a mixed state at T<70 and 10 T< μ 0 H<30 T. The appearance of a non-collinear magnetic structure in high magnetic fields is found. The existence of an additional field-induced transition in fields above 50 T is predicted.