Abstract
This paper reports the effect of high-spin Co2+-doped CuCrO2 delafossite-type oxide on the structure and physical properties. X-ray diffraction and Raman spectroscopy show that the structure is maintained for all Co-doped samples for chromium. The incorporation of this element generates anisotropic microstrains in the structure. The temperature dependence of zero field-cooling magnetization was measured. All samples exhibit an AFM transition around 24 K. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Cr 3d t(2g) band and the t(2g) states of the high-spin Co2+ to develop other spin orders benefiting to enhance magnetic susceptibility and support the evidence of new FM transition. The coupling between the magnetic order and ferroelectric order is also characterized.