Mn-Ga-Al/Fe-Co nanocomposite hard magnetic materials were combined from Mn 65 Ga 20 Al 15 hard magnetic and Fe 65 Co 35 soft magnetic phases. The nanoparticles of hard and soft magnetic phases were fabricated by using high energy ball milling method with milling times of 8 h and 32 h to have size of about 50 nm and 70 nm, respectively. The hard and soft magnetic phases were then mixed together for 1 h with different weight fractions of Fe 65 Co 35 soft magnetic phase from 5 to 20%. The nanocomposites show quite good exchange-spring coupling of hard and soft magnetic phases. Saturation magnetization (M s ) and coercivity (H c ) of the nanocomposites strongly depend on the weight fraction of the soft magnetic phase. The M s increases rapidly, while the H c decreases with increasing the fraction of the soft magnetic phase. With appropriate fabrication conditions, the Mn-Ga-Al/Fe-Co nanocomposites can possess M s > 50 emu g −1 and H c > 9 kOe. Maximum energy products, (BH) max , above 4 MGOe have been achieved for this kind of rare earth-free hard magnetic materials.

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Resources development & sharing has become an important subject of widespread concern in the world and it is the inevitable demand of information society development. Sharing is not only a useful way to save money, reduce duplication of investment, improve resource utilization and realize resources complement, but also an important way to greatly improve the information flow and information services support capabilities, and promote society access to information in general. This paper introduces the importance of resources sharing between the libraries of China and Southeast Asian and it refers to the cooperation ways of digital resources sharing.

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Graphene film electrodes have many important applications, but the fabriacion of these electrodes is difficult dues to the poor processing of graphene. This article describes the preliminary results of using 3D printing technology to fabricate thin-film electrodes from graphene oxide inks. Graphene oxide ink is synthesized by chemical method. The graphene oxide (GO) and reduction graphene oxide (r GO) thin film were chacracterized by filed scanning electron microscopy (FESEM) and Energy-dispersive X-ray spectrocopy (EDX spectrocopy) to make sure the morphological and optical characteristics of the thin film. In addition, the electrochemical aera active studies were also determined by cyclic voltametry (CV) curves. The r GO thin film displays higher electrochemical area active in comparison with GO, which is 2.56 cm2 compare to 0.31 cm2, indicating the best result for the superior conductivity of thin film electrode.