Investigations of the magnetic behavior of the layered oxide, ${\text{LiNi}}_{0.65}{\text{Co}}_{0.25}{\text{Mn}}_{0.10}{\text{O}}_2$, through ac and time-dependent susceptibility, dc linear and nonlinear susceptibility as well as neutron-diffraction measurements are presented. A ferrimagneticlike spin ordering appears at 119 K with a spontaneous magnetization coexisting with spin frustration in two dimensions (2D). At lower temperature, a cluster-glass transition is found at 17.4 K indicating a transformation to a completely frustrated state in three dimensions (3D). A dimensionality crossover with temperature, from 2D to 3D, in a magnetically frustrated system has been demonstrated. The observed magnetic behavior is believed to originate from a percolating system of spin clusters defined by disordered and frustrated exchange interactions and the findings conform well with predictions of the percolation cluster model.

• Received 13 April 2010

DOI:https://doi.org/10.1103/PhysRevB.81.224411