• Role of Co dopants on the structural, optical and magnetic properties of lead-free ferroelectric Na0.5Bi0.5TiO3 materialsRole of Co dopants on the structural, optical and magnetic properties of lead-free ferroelectric Na0.5Bi0.5TiO3 materials

    Co-doped Na0.5Bi0.5TiO3 materials were fabricated by a sol-gel technique. The structural distortion of Codoped Na0.5Bi0.5TiO3 materials was due to the difference between the radii of Co dopants and Ti hosts. The optical band gap decreased from 3.11 to 1.83 eV because of the local state of the Co cation in the band structure. Room temperature ferr...

    pdf7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 11 | Lượt tải: 0

  • Cost-effective porous carbon materials synthesized by carbonizing rice husk and K2CO3 activation and their application for lithium-sulfur batteriesCost-effective porous carbon materials synthesized by carbonizing rice husk and K2CO3 activation and their application for lithium-sulfur batteries

    In this work, we developed highly porous activated carbon (AC) materials with micro/meso porosity through carbonizing rice husk and treating them with K2CO3. Elemental sulfur was then loaded to the micropores through a solution infiltration method to form rice husk-derived activated carbon (RHAC)@S composite materials. The as-prepared RHAC@S com...

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  • Novel approaches in cancer management with circulating tumor cell clustersNovel approaches in cancer management with circulating tumor cell clusters

    Tumor metastasis is responsible for the vast majority of cancer-associated morbidities and mortalities. Recent studies have disclosed the higher metastatic potential of circulating tumor cell (CTC) clusters than single CTCs. Despite long-term study on metastasis, the characterizations of its most potent cellular drivers, i.e., CTC clusters have ...

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  • Evaluation of catalytic activity of MeOx/sepiolite in benzyl alcohol oxidationEvaluation of catalytic activity of MeOx/sepiolite in benzyl alcohol oxidation

    A series of MeOx/sepiolite (Me ¼ Cu, Cr, Mn, Co, Ni) catalysts was prepared through the deposition eprecipitation and characterized by means of XRD, EDS, SEM, BET, and H2-TPR. The structural characterization showed a fine distribution of MeOx metal oxides on magnesium silicate nanobars. The sepiolite-loaded-metal oxide catalysts have been screene...

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  • Current-induced domain wall motion in antiferromagnetically coupled structures: Fundamentals and applicationsCurrent-induced domain wall motion in antiferromagnetically coupled structures: Fundamentals and applications

    The current-induced spin-torques provide an efficient means of manipulating magnetization, introducing the way for next generation spintronic devices. During the past decades, studies have mainly focused on ferromagnetic materials. In recent years, antiferromagnetically coupled structures have been found with more efficient spin-toques and robust...

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  • Magnetoresistive performances in exchange-biased spin valves and their roles in low-field magnetic sensing applicationsMagnetoresistive performances in exchange-biased spin valves and their roles in low-field magnetic sensing applications

    The magnetoresistive properties of pinned spin valves (SV) and their roles in low-field sensing applications were characterized. The magnetoresistive parameters were extracted, including the exchange bias (Heb) field as a function of the iron content in the CoFe layer and the antiferromagnetic (AFM) thickness, the magnetoresistance (MR) ratio ve...

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  • Magnetocaloric effect and critical behavior in Fe-La-Zr rapidly quenched ribbonsMagnetocaloric effect and critical behavior in Fe-La-Zr rapidly quenched ribbons

    Fe90-xLaxZr10 (x ¼ 1 and 2) rapidly quenched ribbons with thickness of about 15 mm were prepared by the melt-spinning method. X-ray diffraction analysis shows that the structure of the ribbons is mostly amorphous. The Curie temperature, TC, of the alloy considerably increased, from ~262 K for x ¼ 1 to ~302 K for x ¼ 2, with increasing La-concent...

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  • Synthesis of organo tin halide perovskites via simple aqueous acidic solution-based methodSynthesis of organo tin halide perovskites via simple aqueous acidic solution-based method

    Organometal halide perovskites have been studied extensively during the last ten years for their interesting applications in solar cells and optoelectronics. One drawback of these materials is the presence of lead inside the compound, thus limiting their practical applications. Replacing lead with tin has been one of the implemented approaches f...

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  • Mô đun xoắn trong mô hình q-state clockMô đun xoắn trong mô hình q-state clock

    Chúng tôi nghiên cứu hiện tượng chuyển pha của mô hình q-state clock hai chiều bằng phương pháp mô phỏng Monte Carlo. Chúng tôi tính toán các đại lượng vật lý như là: nhiệt dung riêng, độ từ hoá và mô đun xoắn cho q > 5 (cụ thể q = 6 và 8). Nhiệt dung riêng và độ từ hóa chỉ ra mô hình có hai chuyển pha, bao gồm chuyển pha trên, T2, giữa pha mất...

    pdf5 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 11 | Lượt tải: 0

  • Phương trình vi - tích phân trung tính kiểu sóng khuếch tánPhương trình vi - tích phân trung tính kiểu sóng khuếch tán

    Tóm tắt Trong bài báo này, chúng tôi nghiên cứu sự tồn tại của nghiệm phân rã cho phương trình vi - tích phân trung tính kiểu sóng khuếch tán bằng cách sử dụng phương pháp điểm bất động. Từ khóa: Phương trình vi - tích phân; nghiệm tích phân; điểm bất động. Abstract In this paper, we study the existence optical-beam-deflection neutral integro-...

    pdf5 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 9 | Lượt tải: 0