مرکز منطقه ای اطلاع رساني علوم و فناوري - Cerium Oxide Buffer Layers on Perovskite-Type Substrates for Preparation of <formula formulatype="inline"> <img src="/images/tex/15043.gif" alt="c"> </formula>-Axis-Oriented <formula formulatype="inline"> <img src="/images/tex/18992.gif" alt="{\\rm YBa}

Title :

Cerium Oxide Buffer Layers on Perovskite-Type Substrates for Preparation of $c$ -Axis-Oriented ${\\rm YBa}_{</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'>Sohma, Mitsugu ; Tsukada, Kenichi ; Yamaguchi, Iwao ; Kamiya, Kunio ; Kondo, Wakichi ; Kumagai, Toshiya ; Manabe, Takaaki</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'>Nat. Inst. of Adv. Sci. & Technol. (AIST), Tsukuba, Japan</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'>19</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'>3</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'>2009</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'>6/1/2009 12:00:00 AM</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'>3463</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'>3466</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'><i>c</i>-axis-oriented epitaxial YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-delta</sub> (YBCO) superconducting films were prepared on perovskite-type single crystal substrates, i.e., SrTiO<sub>3</sub>, LaAlO<sub>3</sub>, NdGaO<sub>3</sub> and YAlO<sub>3</sub> with cerium oxide (CeO<sub>2</sub>) buffer layers by fluorine-free metalorganic deposition (MOD) at relatively low heating rates. The YBCO films on these CeO<sub>2</sub>-buffered substrates exhibited high critical current densities with an average of 3-5 MA/cm<sup>2</sup> at 77.3 K. Using CeO<sub>2</sub> buffer layers we could avoid the occurrence of undesired <i>a</i>-axis-oriented grains of YBCO on these substrates despite employing lower heating rates. The lattice constants of YBCO films, CeO<sub>2</sub> buffer and substrates were compared. It was found that both the YBCO films and CeO<sub>2</sub> buffer were elastically deformed.</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; cerium compounds; critical current density (superconductivity); elastic deformation; high-temperature superconductors; lattice constants; superconducting thin films; yttrium compounds; LaAlO<sub>3</sub>; NdGaO<sub>3</sub>; SrTiO<sub>3</sub>; YAlO<sub>3</sub>; YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>-CeO<sub>2</sub>-LaAlO<sub>3</sub>; YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>-CeO<sub>2</sub>-NdGaO<sub>3</sub>; YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>-CeO<sub>2</sub>-SrTiO<sub>3</sub>; YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>-CeO<sub>2</sub>-YAlO<sub>3</sub>; c-axis-oriented epitaxial superconducting film preparation; cerium oxide buffer layers; elastic deformation; fluorine-free metalorganic deposition; high critical current density; lattice constants; perovskite-type single crystal substrates; temperature 77.3 K; <formula formulatype=$ ${rm CeO}_{2}$ buffer layer; MOD; perovskite-type substrate; superconducting films;