Acceptor-defect mediated room temperature ferromagnetism in (Mn2+, Nb5+) co-doped ZnO nanoparticles

作者：Satheesan M K; Vani K; Kumar Viswanathan^*

来源：Ceramics International, 2017, 43(11): 8098-8102.

DOI：10.1016/j.ceramint.2017.03.132

• Zinc oxide
• co-doping
• Acceptors
• Ferromagnetism

In this study we report room temperature ferromagnetism in Manganese and Niobium co-doped ZnO nanoparticles synthesized by sol-gel method. The room temperature ferromagnetic ordering in the Zn0.99-2.5xNbxMn0.01O nanoparticles is found to vary as a function of Nb5+ concentration. Highest value of saturation magnetization, M-s was obtained for the composition co-doped with 2% niobium. Results obtained from Electron paramagnetic resonance and Photoluminescence studies have been combined to establish the acceptor-defect mediated ferromagnetic ordering in these nanoparticles. A quasi-indirect exchange mechanism mediated by singly ionized zinc vacancies, V-Zn is proposed to explain the enhanced ferromagnetic ordering in (Mn, Nb) co-doped ZnO nanoparticles.

• 出版日期2017-8-1