مرکز منطقه ای اطلاع رساني علوم و فناوري - Optimization of the <formula formulatype="inline"> <img src="/images/tex/21561.gif" alt="\\hbox {BaSnO}_{3}"> </formula> Doping Content in <formula formulatype="inline"> <img src="/images/tex/21562.gif" alt="\\hbox {GdBa}_{2}\\hbox {Cu}_{3}\\hbox {O}

Title :

Optimization of the $\\hbox {BaSnO}_{3}$ Doping Content in $\\hbox {GdBa}_{2}\\hbox {Cu}_{3}\\hbox {O}_{7-\</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Kyung-Pil Ko ; Soon-Mi Choi ; Jung-Woo Lee ; Rock-Kil Ko ; Seung-Hyun Moon ; Chan Park ; Sang-Im Yoo</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author_Institution : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Dept. of Mater. Sci. & Eng., Seoul Nat. Univ., Seoul, South Korea</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Volume : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>24</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Issue : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>6</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fYear : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fDate : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Dec. 2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Firstpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Lastpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>8</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Abstract : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>We tried to optimize the BaSnO<sub>3</sub> (BSO) doping content in GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> (GdBCO) coated conductors (CCs) on CeO<sub>2</sub>-buffered ion-beam assisted deposition (IBAD)-MgO templates. The BSO-doped GdBCO CCs with various x vol% ( x=0, 2, 3, 4, 5, and 6) relative to GdBCO were prepared at 800°C with the oxygen pressure of 300 mtorr by pulsed laser deposition (PLD), and their pinning properties were characterized by measuring magnetic hysteresis curves for the applied field parallel to the c-axis of GdBCO (B//c) up to 5 T and field-orientation dependence of transport critical currents for 1, 3, and 5 T at 65 and 77 K, respectively. Among all samples, a 5 vol% BSO-doped GdBCO CC exhibited the highest maximum pinning force density (F<sub>p,max</sub>) values of 32.5 GN/m<sup>3</sup> near 4 T at 65 K and 6.5 GN/m<sup>3</sup> near 3.2 T at 77 K, for B//c (θ = 180 <sup>°</sup>), and also the highest minimum transport critical current density (Jc,min) of 0.39 MA/cm<sup>2</sup> at 77 K in 1 T and 0.68 MA/cm<sup>2</sup> at 65 K in 3 T, for θ = 120<sup>°</sup>, evidencing that 5 vol% is the optimum BSO content. Observation of BSO-doped GdBCO CCs by transmission electron microscopy revealed that the effective flux pinning of BSO-doped GdBCO CC was attributed to the BSO nanorods of ~ 10-nm diameters roughly aligned along the c-axis of the GdBCO matrix.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>barium compounds; critical current density (superconductivity); doping profiles; flux pinning; gadolinium compounds; high-temperature superconductors; ion beam assisted deposition; magnetic hysteresis; pulsed laser deposition; superconducting thin films; transmission electron microscopy; GdBCO coated conductors; GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>:BaSnO<sub>3</sub>; doping content optimization; flux pinning; ion-beam assisted deposition; magnetic flux density 1 T to 5 T; magnetic hysteresis curves; minimum transport critical current density; pinning force density; pressure 300 mtorr; pulsed laser deposition; temperature 65 K; temperature 77 K; temperature 800 degC; transmission electron microscopy; Critical current density (superconductivity); Doping; High-temperature superconductors; Magnetic hysteresis; Pulsed layer deposition; Superconducting thin films; Yttrium barium copper oxide; <formula formulatype=$ $hbox{BaSnO}_{3}$ (BSO) nanorods; $hbox{GdBa}_{2}hbox{Cu}_{3}hbox{O}_{7-delta}$ (GdBCO); field-orientation dependence of $J_{c}$; pinning force density; transmission electron microscopy (TEM);