Field-Induced Magnetic Transitions in the One-Dimensional Compound Ca₃Co₂O₆

Abstract

Magnetization measurements on the one-dimensional oxide Ca₃Co₂O₆ having a triangular net of Co₂O₆ chains have been carried out both in static and pulsed high magnetic fields. The M/H vs. T curve obeys the Curie-Weiss law at high temperatures. Below 25 K, however, M/H increases abruptly, and a plateau is observed at 1/3 of the full moment in the M-H curve, suggesting a ferrimagnetic state of the ferromagnetic chains due to the antiferromagnetic interchain interaction. At low H, this system is considered to be in a partially disordered antiferromagnetic state for 10 K