MAGNETIC STATE OF DY3CO

Using data on magnetization, magnetoresistance, a.c. susceptibility and specific heat, magnetic phase diagrams of the compound Dy3Co were obtained for the main crystallographic axis. The different antiferromagnetic (AF) structures exist below T-N=44 K: AF(t) exists at T < T-t= 32 K and AF(2) exists at the temperatures T-t < T < T-N. The field-induced magnetic phase transitions observed along the three main axes are associated with a complex non-collinear antiferromagnetic structure and are accompanied by a significant change in the electrical resistivity (Delta p/p up to - 40%) owing to the appearance or disappearance of the energy gaps on superzone boundaries. At the phase transitions along a- and c-axes, large hysteresis loops are observed at low temperatures. At T < 4 K the single crystal of Dy3Co remains in a magnetized state after the application and removal of a magnetic field along the c-axis.