,Room-Temperature Ferromagnetism of Co-Doped CeO2 Thin Films on Si(111) substrates

• 作 者: SONG Yuan-Qiang ZHANG Huai-Wu WEN Qi-Ye LI Yuan-Xun John Q. Xiao
• 机 构: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Scien
• 出 处: 中国物理快报（英文版）
• 发表日期: 2007年1期

Using Co2O3 as the Co source, doped cerium oxide thin films with the composition of Ce0.97Co0.03O2-δ (CCO)are deposited on Si(111) and glass substrates by pulse laser deposition technique. X-ray diffraction reveals that CCO films with (111) preferential orientation are grown on Si, while the film on glass is polycrystalline with nanocrystal. X-ray photoelectron spectroscopy shows that the Co displaces the Ce atom and exists in high spin state rather than low spin state, which contributes to the room-temperature ferromagnetism confirmed by vibration sample magnetometer.