Nanocomposite CoPt:C films were fabricated by sputtering Co, Pt and C onto water‐cooled Si(100) substrates with subsequent annealing. The microstructure and the magnetic properties of these CoPt:C films were investigated as a function of Pt concentration. It was found that the orientations of CoPt grains and the magnetic properties are related strongly to the Pt content. Perpendicular anisotropy was observed in the films with high Pt content. By changing Pt concentrations, films with adjustable coercivity, a grain size less than 10 nm and strong perpendicular magnetic anisotropy were obtained. The crystal lattice structure and the intergranular interactions were proposed to be key factors in the magnetic properties of the CoPt:C films. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

To investigate the nature of the ψ(3770) resonance and to measure the cross section for e + e − →D D, a cross-section scan data sample, distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detector operated at the BEPCII collider in the year 2010. By analyzing the large angle Bhabha scattering events, we measure the integrated luminosity of the data sample at each center-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb −1 , where the first uncertainty is statistical and the second systematic.