|
Effect of (Cr, Fe)-substitution at B sites of CuB1-x(Cr1/2Fe1/2)xO2 delafossite oxides on optical, magnetic, and dielectric properties |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Sornamol Traiphop 2. Teerasak Kamwanna |
| Title | Effect of (Cr, Fe)-substitution at B sites of CuB1-x(Cr1/2Fe1/2)xO2 delafossite oxides on optical, magnetic, and dielectric properties |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2564 |
| Journal Title | Engineering and Applied Science Research |
| Journal Vol. | 48 |
| Journal No. | 6 |
| Page no. | 712-717 |
| Keyword | Delafossite oxides, CuBO2, Magnetic properties, Dielectric properties |
| URL Website | https://www.tci-thaijo.org/index.php/easr/index |
| Website title | Engineering and Applied Science Research |
| ISSN | 2539-6161 |
| Abstract | In this work, we report room temperature ferromagnetic and colossal dielectric behavior in delafossite oxides of CuB1-x(Cr1/2Fe1/2)xO2 with x = 0.01 and 0.03. All samples were synthesized by the solid-state reaction method. The microstructure, optical, magnetic, and dielectric properties were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-visible spectroscopy, vibrating sample magnetometer (VSM), and impedance analyzer, respectively. The crystal structure of all samples was found to be of the R-3m delafossite structure, while their particle size was ~ 300 nm in the undoped sample (x = 0) and slightly increased with increasing x value. Regarding their optical properties, we observed the absorbance peak at wavelength ~250 nm corresponding to the direct optical band gap of about 2.90, 2.88, and 2.85 eV for sample x = 0.00, 0.01, and 0.03, respectively. The magnetic properties of the doped samples (x = 0.01 and 0.03) exhibited a ferromagnetic behavior at room temperature with a finite coercivity of about ~300 Oe. Furthermore, the magnetization of this CuB1-x(Cr1/2Fe1/2)xO2 delafossite is increased with increasing x value. Finally, the dielectric measurements revealed that Cr plays a role in maintaining the dielectric permittivity of the CuB1-x(Cr1/2Fe1/2)xO2 samples. |
