Magnetic nanoparticles induced dielectric enhancement in (La, Gd)(2)O-3: SiO2 composite systems

作者：Kao, T H; Mukherjee, S; Yang, H D^*

来源：Journal of Magnetism and Magnetic Materials, 2013, 346: 11-15.

DOI：10.1016/j.jmmm.2013.06.054

• Rare earth oxide nanoparticle
• High-k materials
• Magnetodielectric effect
• Diffuse phase transition

Magnetic Gd2O3 and non-magnetic La2O3 nanoparticles (NPs) have been synthesized together with different doping concentrations in SiO2 matrix via sol-gel route calcination at 700 degrees C and above. Properly annealed NP-glass composite systems show enhancement of dielectric constant and magnetodielectric effect (MDE) near room temperature, depending on superparamagnetic NPs concentrations. From application point of view, the enhancement of dielectric constant along with MDE can be achieved by tuning the NPs size through varying calcination temperature and/or increasing the doping concentration of magnetic rare earth oxide.

• 出版日期2013-11
• 单位中山大学