  We report on the magnetic properties of geometrically frustrated K3CrO4, in
which Cr5+ cations are arranged on a distorted pyrochlore lattice. The crystal
structure, static and dynamic magnetic properties of the compound are
investigated in detail. A combination of DC and AC magnetic susceptibility
measurements together with thermoremanent magnetization decay measurements
reveal several magnetic transitions: the onset of glassy canted
antiferromagnetic order occurs at 36 K, followed by the appearance of
ferromagnetic/ferrimagnetic cluster glass behavior below the freezing
temperature of 20 K. Further field-induced, temperature-dependent transitions
are observed in the range 3-10 K. The frequency dependence of the freezing
temperature for the cluster glass state is analyzed on the basis of dynamic
scaling laws including the critical slowing down formula and the Vogel-Fulcher
law.
