Effect of Sm~(3+) on dielectric and magnetic properties of Y_3Fe_5O_(12) nanoparticles

摘要

The Sm~(3+) doped Y_(3-x)Sm_xFe_5O_(12) (x = 0-3) nanopowders were prepared using modified sol-gel route. The crystalline structure and morphology was confirmed by X-ray diffraction and atomic force microscopy. The nanopowders were sintered at 950 ℃/90 min using microwave sintering method. The lattice parameters and density of the samples were increased with an increase of Sm~(3+) concentration. The room temperature dielectric (ε′ and ε″) and magnetic (μ′ and μ″) properties were measured in the frequency range up to 20 GHz. The room temperature magnetization studies were carried out using Vibrating sample magnetometer using filed of 1.5 T. Results of VSM show that the saturation and remnant magnetization of Y_(3-x)Sm_x Fe_5O_(12) (0-3) decreases on increasing the Sm concentration (x). The low values of magnetic (μ′ and μ″) properties makes them a good candidates for microwave devices, which can be operated in the high frequency range.