Structural and magnetic properties of Co-doped Gd2O3 nanorods

作者：Patel Sandeep K S; Dhak Prasanta; Kim Min Kwan; Lee Jae Hyeok; Kim Miyoung; Kim Sang Koog^*

来源：Journal of Magnetism and Magnetic Materials, 2016, 403: 155-160.

DOI：10.1016/j.jmmm.2015.11.093

• Hydrothermal synthesis
• Gd2O3 nanorods
• Curie-Weiss law
• Magnetic semiconductor

Cobalt-doped Gd2O3 (Gd2-xCoxO3, 0 <= x <= 0.06) nanorods of about 100 nm diameter and 2 mu m length were synthesized using a simple hydrothermal method. XRD, Raman, XPS, and TEM measurements showed the samples to have a single cubic phase structure of Gd2O3 doped with Co2+ cations, without any cobalt clusters. All the samples showed paramagnetism at room temperature as well as at 5 K. The samples' high magnetization values at 5 K were due to reduction of the thermal randomization of the magnetic spins. The Curie-Weiss fitting of the magnetic data reflected antiferromagnetism along with paramagnetism due to the exchange interactions of Gd3+ via O2- ions and coupling between Co2+'-Co2+ pairs.

• 出版日期2016-4-1