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Browsing by Author Pham, Duc Thang

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  • Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by sol-gel method.pdf.jpg
  • Article

  • Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by solegel method

    • Authors: Nguyen, Dang Co; Le, Viet Cuong; Bui, Dinh Tu; Pham, Duc Thang; Luong, Xuan Dien; Vu, Ngoc Hung; Ngo, Duc Quan (2019)

  • Lead-free Bi0.5(Na0.80K0.20)0.5TiO3 (BNKT) ferroelectric films were synthesized on Pt/Ti/SiO2/Si substrates via the chemical solution deposition. The influence of the crystallization temperature on the microstructures, the ferroelectric and energy-storage properties of the films was investigated in detail. The results showed that the BNKT films have reached the well crystallized state in the single-phase perovskite structure at 700 C. Ferroelectric and energy-storage properties of the films were significantly enhanced by increasing the crystallization temperature. The remnant polarization (2Pr) and maximum polarization (2Pm) reached the highest values of 18.4 mC/cm2 and 61.2 mC/cm2, ...
  • 789.pdf.jpg
  • Article

  • Influence of Sr Doping on Magnetic and Magnetocaloric Properties of Nd0.6Sr0.4MnO3

    • Authors: Ho, Thi Anh; Nguyen, Ngoc Huyen; Pham, Duc Thang (2020)

  • Nd0.6Sr0.4MnO3 sample was fabricated by a solid-state reaction method and its magnetic, magnetocaloric properties were investigated. The Curie temperature, TC, at which a ferromagnetic-paramagnetic transition occurred was found to be of about 270 K. An analysis using the Banejee’s criterion of the experiment results for magnetization as a function of temperature and magnetic field and the universal curves of the normalized entropy change versus reduced temperature indicated that the sample undergo the second-order magnetic phase transition. Furthermore, the maximum magnetic entropy change that occurred near TC, measured at a magnetic field span of 50 kOe was found to be of about 6.0 J...
  • 61.pdf.jpg
  • Article

  • Influences of pH Values on Magnetic CoNiP Nanowires Fabrication

    • Authors: Luu, Van Thiem; Le, Tuan Tu; Pham, Duc Thang (2014)

  • CoNiP nanowire arrays were fabricated by electrodeposition method into polycarbonate (PC) templates at different pH values. It is obvious that the crystal structure of the CoNiP nanowires depends on the pH values of electrolyte. The XRD results show that crystal structure of the CoNiP nanowires is hcp structure and the intensity of the hcp (002) increased enhances as solution pH=3.5. Magnetic measurements indicate that CoNiP nanowires show a transition from soft to hard magnetic properties with pH values from 2.0 to 3.5 and the maximum coercivity is 1630 Oe.

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Browsing by Author Pham, Duc Thang

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 5 of 5
  • Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by sol-gel method.pdf.jpg
  • Article

  • Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by solegel method

    • Authors: Nguyen, Dang Co; Le, Viet Cuong; Bui, Dinh Tu; Pham, Duc Thang; Luong, Xuan Dien; Vu, Ngoc Hung; Ngo, Duc Quan (2019)

  • Lead-free Bi0.5(Na0.80K0.20)0.5TiO3 (BNKT) ferroelectric films were synthesized on Pt/Ti/SiO2/Si substrates via the chemical solution deposition. The influence of the crystallization temperature on the microstructures, the ferroelectric and energy-storage properties of the films was investigated in detail. The results showed that the BNKT films have reached the well crystallized state in the single-phase perovskite structure at 700 C. Ferroelectric and energy-storage properties of the films were significantly enhanced by increasing the crystallization temperature. The remnant polarization (2Pr) and maximum polarization (2Pm) reached the highest values of 18.4 mC/cm2 and 61.2 mC/cm2, ...
  • 789.pdf.jpg
  • Article

  • Influence of Sr Doping on Magnetic and Magnetocaloric Properties of Nd0.6Sr0.4MnO3

    • Authors: Ho, Thi Anh; Nguyen, Ngoc Huyen; Pham, Duc Thang (2020)

  • Nd0.6Sr0.4MnO3 sample was fabricated by a solid-state reaction method and its magnetic, magnetocaloric properties were investigated. The Curie temperature, TC, at which a ferromagnetic-paramagnetic transition occurred was found to be of about 270 K. An analysis using the Banejee’s criterion of the experiment results for magnetization as a function of temperature and magnetic field and the universal curves of the normalized entropy change versus reduced temperature indicated that the sample undergo the second-order magnetic phase transition. Furthermore, the maximum magnetic entropy change that occurred near TC, measured at a magnetic field span of 50 kOe was found to be of about 6.0 J...
  • 61.pdf.jpg
  • Article

  • Influences of pH Values on Magnetic CoNiP Nanowires Fabrication

    • Authors: Luu, Van Thiem; Le, Tuan Tu; Pham, Duc Thang (2014)

  • CoNiP nanowire arrays were fabricated by electrodeposition method into polycarbonate (PC) templates at different pH values. It is obvious that the crystal structure of the CoNiP nanowires depends on the pH values of electrolyte. The XRD results show that crystal structure of the CoNiP nanowires is hcp structure and the intensity of the hcp (002) increased enhances as solution pH=3.5. Magnetic measurements indicate that CoNiP nanowires show a transition from soft to hard magnetic properties with pH values from 2.0 to 3.5 and the maximum coercivity is 1630 Oe.