Magnetic and Magneto-Optical Properties of Sputtered Co-CeO₂ Thin Films on Al₂O₃ (0001) Substrates with (100) Orientation

Abstract:

Diluted magnetically doped CeO₂ films is an attractive dilute magnetic oxide which would facilitate the practical realization of spintronic devices and may also be used to explore novel magneto-optical applications. In this experiments, 3 at% cobalt-doped CeO₂ films with the stoichiometry of Ce_0.97Co_0.03O_2-δ (CCO) were deposited by magnetron sputtering methods on Al₂O₃ (0001) substrates. The structural, magnetic, and magneto-optical properties were investigated. The results indicate that CCO films with CeO₂ (100) orientation can readily be obtained via magnetron sputtering on Al₂O₃ (0001) substrates. Films are ferromagnetic at room temperature, which is anisotropic with an out-of-plane magnetization easy axis. Magneto-optical measurements exhibit a giant Faraday rotation of about 4800 deg/cm at 650 nm wavelength in out-of-plane direction. The excellent room-temperature ferromagnetism and the giant Faraday rotation in CCO films show highly potential applications in novel magneto-optical devices as well as in spintronics.

• Periodical: Materials Science Forum (Volume 687)
• Pages: 117-121
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.687.117
• Online since: June 2011
• Authors: Yuan Qiang Song, Dainan Zhang, Ying Li Liu, Yuan Xun Li, Qi Ye Wen
• Keywords: Co Doped CeO₂, Diluted Magnetic Oxide, Magnetron Sputtering, Thin Film

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