Structure Dependent Room Temperature Ferromagnetism In Co, Nb Co-doped BaTiO3 Thin Films Prepared By RF Sputtering

¹New Technologies Research Centre, University of West Bohemia, Plze? 30614, Czech Republic

²Institute of Physics, VŠB-Technical University of Ostrava, 17. Listopadu 15, 70833 Ostrava-Poruba, Czech Republic

³RMTVC, VŠB-Technical University of Ostrava, 17. Listopadu 15, 70833 Ostrava-Poruba, Czech Republic

Adv. Mater. Lett., 2016, 7 (6), pp 445-448

DOI: 10.5185/amlett.2016.6183

Publication Date (Web): May 30, 2016

Copyright © IAAM-VBRI Press

E-mail: rsiddhes@yahoo.com

Abstract

Thin films of BaTiO₃ and Co, Nb co-doped BaTiO₃ on glass and Si (100) substrates were deposited by RF sputtering (at 350 ºC), and annealed. The amorphous and crystalline phases were observed for the as-deposited and annealed samples, respectively from the X-ray diffraction (XRD) studies. The magnetic behaviour of the pure and doped BaTiO₃ films was studied by vibrating sample magnetometry (VSM). In this study, the ferromagnetic behaviour at room temperature was observed in the Co, Nb co-doped BaTiO₃ of both amorphous and crystalline films. The annealed polycrystalline Co, Nb co-doped BaTiO₃ films have the larger saturation magnetization and coercivity than the amorphous films. The room temperature ferromagnetic responses were also observed by the Magneto-optical Kerr effect (MOKE) measurements for both as-deposited and annealed samples. 

Keywords

Thin films, sputtering, phase transformation, functional, magnetic materials