Dielectric responses of the layered cobalt oxysulfide Sr_2Cu_2CoO_2S_2 with CoO_2 square-planes

S. Okada, I. Terasaki, H. Ooyama +1

We have studied the dielectric responses of the layered cobalt oxysulfide Sr${}_2$Cu${}_2$CoO${}_2$S${}_2$ with the CoO${}_2$ square-planes. With decreasing temperature below the Néel temper…