Structure, optical, and magnetic properties of rutile Sn1−xMnxO2 thin films

✍ Scribed by Yuhua Xiao; Shihui Ge; Li Xi; Yalu Zuo; Xueyun Zhou; Li Zhang; Guowei Wang; Xiufeng Han; Zhenchao Wen

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 346 KB
• Volume: 255
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2009.04.193

✦ Synopsis

A B S T R A C T Sn 1Àx Mn x O 2 (x 0.11) thin films were fabricated by sol-gel and spin-coated method on Si (1 1 1) substrate. X-ray diffraction revealed that single-phase rutile polycrystalline structure was obtained for x up to about 0.078. Evolution of the lattice parameters and X-ray photoelectron spectroscopy studies confirmed the incorporation of Mn 3+ cations into rutile SnO 2 lattice. Optical transmission studies show that the band gap energy (E g ) broadens with the increasing of Mn content. Magnetic measurements revealed that all samples exhibit room temperature ferromagnetism (RTFM), which is identified as an intrinsic characteristic. Interestingly, the magnetic moment per Mn atom decreases with the increasing Mn content. The origin of RTFM can be interpreted in terms of the bound magnetic polaron model.