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Fabrication of Magnesium Diboride Thin Films by Aerosol Deposition
B.B.Sinha,정국채,장세훈,한병동,박동수,X. L. Wang,S. X. Dou 한국초전도학회 2011 Progress in superconductivity Vol.13 No.2
Superconducting MgB2 thin films were fabricated by using a novel aerosol deposition technique wherein the pre-reacted powder is directly transformed into respective thin film. The formed thin films were characterized by X-ray diffraction technique and FE-SEM to understand its structure and morphology and the superconducting behavior has been characterized with the four probe resistivity measurement. The as-deposited thin films were formed into the frustrated amorphous structure,which were relaxed on the further heat treatment at 900 °C for 3 hrs. The relaxed amorphous MgB2 thin films showed a comparatively high superconducting onset at about 38 K.
Fabrication of Magnesium Diboride Thin Films by Aerosol Deposition
Sinha, B.B.,Chung, K.C.,Jang, S.H.,Hahn, B.D.,Park, D.S.,Wang, X.L.,Dou, S.X. The Korean Superconductivity Society 2011 Progress in superconductivity Vol.13 No.2
Superconducting $MgB_2$ thin films were fabricated by using a novel aerosol deposition technique wherein the pre-reacted powder is directly transformed into respective thin film. The formed thin films were characterized by X-ray diffraction technique and FE-SEM to understand its structure and morphology and the superconducting behavior has been characterized with the four probe resistivity measurement. The as-deposited thin films were formed into the frustrated amorphous structure, which were relaxed on the further heat treatment at $900^{\circ}C$ for 3 hrs. The relaxed amorphous $MgB_2$ thin films showed a comparatively high superconducting onset at about 38 K.
T. Badapanda,S. Sarangi,B. Behera,P.K. Sahoo,S. Anwar,T. P. Sinha,G.E. Luz Jr.,E. Longo,L.S. Cavalcante 한국물리학회 2014 Current Applied Physics Vol.14 No.5
For this study, a microcrystalline Ba(Zr0.05Ti0.95)O3 (BZT) powder was prepared by a high energy ball milling method followed by calcination at 1100 C for 4 h. The calcined powder was structurally characterized by X-ray diffraction and Rietveld refinement data, which showed that this material has a perovskite-type tetragonal structure with a space group of (P4mmm). The micro-Raman spectrum revealed local lattice distortions due to distorted octahedral [TiO6] clusters. The temperature and frequency-dependent dielectric study of the BZT ceramic showed normal phase transition behavior. The ferroelectric property was studied by a PeE hysteresis loop. Optical band gap was investigated by ultravioletevisible (UVevis) absorption spectroscopy at room temperature. The UVevis spectrum indicated that the BZT powder has an optical band gap of 3.15 eV.