Layered cobalt oxysulfide Sr2Cu2CoO2S 2 crystallizes in an unusual intergrowth structure which represents a combination of SrCu2S2 and SrCoO2. Sr 2Cu2CoO2S2 is a p-type antiferromagnetic semiconductor with TN(= 200 K). And below T t(= 125 K), the antiferromagnetic nature is changed from 2D to 3D. We studied Seebeck coefficient of Sr2Cu2CoO 2S2 and its Cu-doped compounds. Their Seebeck coefficients near T, tend to enhance by the Cu-doping into CoO2 square planes. The curves of the temperature dependence of Sr2Cu 2CuxCo1-xO2S2 is changed near TN, and the change points shift to high temperature by Cu-doping. The behavior resembles in TN shift of the magnetic property. The transport properties of Cu-doped Sr2Cu 2CoO2S2 is affected by their magnetism.
- Seebeck coefficient
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering