Significant Atomic Displacement at isostructural Transition in Li_(0.99)Cu_(0.01)CrO_2 and its Effects

摘要

LiCrO_2 is a triangular lattice antiferromagnetic compound exhibiting geometrically frustrated two dimensional arrangement of Cr ions with T_N = 62 K at which an isostructural transition occurs. We show, using temperature dependent high energy synchrotron X-ray diffraction studies, that upon a nominal 1% Cu doping at the Li site, there are large changes in structural parameters and the (coupled) magnetic and dielectric properties.