A trinuclear Mn(Ⅱ)coordination complex Mn_3(HEDTA)_2·10H_2O(EDTA=ethylene diamine tetraacetic acid)1 has been synthesized and characterized by X-ray crystal structure determination.In addition,IR spectrum,thermogravimetric analysis,electron paramagnetic resonance(EPR)spectra and magnetic susceptibility of this complex are discussed.X-ray determination indicates that six-and seven-coordinate modes between Mn(Ⅱ)and H_4EDTA exist alternately in 1.Furthermore, detailed discussion of magnetic ordering in the temperature range of 2～300 K reveals the antiferromagnetic interactions in the complex.
Cu3N and AlxCu3N films were prepared with reactive magnetron sputtering method. The two films were deposited on glass substrates at 0.8 Pa N2 partial pressure and 100 ℃ substrate temperature by using a pure Cu and Al target,respectively. X-ray diffraction (XRD) measurements show that the un-doped film was composed of Cu3N crystallites with anti-ReO3 structure and adopted 111 preferred orientation. XRD shows that t he growth of Al-doped copper nitride films (AlxCu3N) was affected strongly by doping Al,the intensity of 111 peak decreases with increasing the concentration of Al and the high concentration of Al could prevent the Cu3N f rom crystallization. AFM shows that the surface of AlxCu3N film is smoother than that of Cu3N film. Compared w ith the Cu3N films,the resistivities of the Al-doped copper nitride films (AlxCu3N) have been reduced,and the microhardness has been enhanced.
In this paper,the characterization of thin films,deposited with the precursor fer-rocene(FcH)by the plasma enhanced chemical vapour deposition(PECVD)technique,was in-vestigated.The films were measured by Scanning Electronic Microscopy(SEM),Atomic ForceMicroscopy(AFM),Electron Spectroscopy for Chemical Analysis(ESCA),and SuperconductingQuantum Interference Device(SQUID).It was observed that the film's layer is homogeneous inthickness and has a dense morphology without cracks.The surface roughness is about 36 nm.Fromthe results of ESCA,it can be inferred that the film mainly contains the compound FeOOH,andcarbon is combined with oxygen in different forms under different supply-powers.The hysteresisloops indicate that the film is of soft magnetism.
Uniformly distributed polycrystalline indium nanohillocks are synthesized on silicon substrates with Au catalyst by using the radio frequency magnetic sputtering technique.The results show that the Au catalyst plays a key role in the formation of indium nanohillocks.After thermally oxidizing the indium nanohillocks at 500°C in air for 5 h,the indium nanohillocks totally transform into In2O3 nanohillocks.The energy-dispersive X-ray spectroscopy result indicates that many oxygen vacancies and oxygen-indium vacancy pairs exist in the In2O3 nanohillocks.Photoluminescence spectra under an Ne laser excitation at 280 nm show broad emissions at 420 nm and 470 nm with a shoulder at 450 nm related to oxygen vacancies and oxygen-indium vacancies at room temperature.
