Both La doped and undoped Ca_(1-x)La_xB_6(x = 0, 0.01, 0.02, 0.03) thin films were prepared by direct current magnetron sputtering method. Morphology and thickness of these films were characterized by atomic force microscopy. Thicknesses of doped films were about twice that of the undoped films, while the grain growth of the film was much enhanced by La doping. X-ray photoelectron spectroscopy(XPS) was used for investigating the chemical composition of film surfaces. Calculated La/Ca atomic ratios were clos...
【基金】
National Natural Science Foundation of China(51102154);
Fundamental Research Funds of Shandong University(2015JC033)
【更新日期】
2017-06-27
【分类号】
TB383.2
【正文快照】
The divalent alkaline earth hexaboride CaB 6 has a sim-ple CsC l type structure.It is a candidate semiconductormaterial[1-2]for spin electronics with a band gap of 0.8 eVapproximately.Since high temperature weak ferromagnet-ism[3]has been reported,CaB 6 h
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