Cover Page June-2016-Advanced Materials Letters

Advanced Materials Letters

Volume 7, Issue 6, Pages 445-448, June 2016
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Structure Dependent Room Temperature Ferromagnetism In Co, Nb Co-doped BaTiO3 Thin Films Prepared By RF Sputtering

R. Siddheswaran1*, Petr Novák1, Jan O?enášek1, Aleš Hendrych2, Ond?ej

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

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

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