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|Title:||The magnetic properties and microscopic structural of a ferromagnetic semiconductor: Rutile TIO2 single crystals implanted with cobalt ions|
|Source:||Huo-Ping, Z., Nan-Nan, X., Gong-Ping, L., Tian-Jing, L., Xing-Xin, G., Jing-Sheng, C. (2013-08-25). The magnetic properties and microscopic structural of a ferromagnetic semiconductor: Rutile TIO2 single crystals implanted with cobalt ions. Surface and Coatings Technology 229 : 109-111. ScholarBank@NUS Repository. https://doi.org/10.1016/j.surfcoat.2012.12.014|
|Abstract:||Ferromagnetic semiconductors with Curie temperatures higher than room temperature are highly desirable for development of spintronic devices. At room temperature, two crystals of rutile (TiO2) were implanted with Co+ at an energy of 80keV by using a fluence of 1×1017ions/cm2 and one of the Co-implanted samples was annealed in N2 atmosphere at 900°C for 30min. The magnetic properties of Co-implanted samples were measured with superconducting quantum interference device magnetometer (SQUID) at room temperature. Furthermore, the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) were applied to describe the structural and compositional properties of Co-implanted samples. In our study, the ferromagnetic behavior of Co-implanted samples is detected at room temperature. The saturation magnetization of the un-annealed sample is ~6.32×10-4emu/cm3 and the annealed sample is ~6.26×10-5emu/cm3. Present studies by XRD, XPS and EXAFS indicate that the Co is in a formal oxidation state throughout the implanted region in the annealed sample, and there is sufficient evidence that showed the presence of cobalt single qualitative state for the un-annealed sample. We also attempt to clarify the relation between ferromagnetic behavior and microscopic structure of the Co-implanted samples in this paper. © 2012 Elsevier B.V.|
|Source Title:||Surface and Coatings Technology|
|Appears in Collections:||Staff Publications|
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