مرکز منطقه ای اطلاع رساني علوم و فناوري - Correlation Between Enhanced <formula formulatype="inline"> <img src="/images/tex/819.gif" alt="{\\rm T}_{\\rm c}"> </formula>, AC Magnetic Irreversibility Line and Heat Treatment in High <formula formulatype="inline"> <img src="/images/tex/819.gif" alt="

Title :

Correlation Between Enhanced ${\\rm T}_{\\rm c}$ , AC Magnetic Irreversibility Line and Heat Treatment in High $</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'>El Yakoubi, Essediq Youssef ; Nafidi, Abdelhakim ; Braigue, Mohamed ; Morghi, Redwane ; Chaib, Hassan ; Hemine, Jamal ; Vinod, M. Srinivasa ; El Gouti, Thami ; Suryanarayanan, Ramanathaan</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'>Phys. Dept., Univ. Ibn Zohr, Agadir, Morocco</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'>21</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'>2011</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'>6/1/2011 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'>2727</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'>2731</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 report here on the preparation, resistivity, AC magnetic susceptibility measurements and effect of heat treatments in (Y<sub>1-x</sub>Sm<sub>x</sub>)(SrBa)Cu<sub>3</sub>O<sub>6+z</sub>. Each sample was subject to two type of heat treatment: oxygen annealing [O] and argon annealing followed by oxygen annealing [AO]. An enhancement of T<sub>c</sub>[AO] was observed for <i>x</i> ≥ 0.4. In the normal state, the [AO] treatment reduced the linear resistivity parameters indicating a diminution of the interaction of carrier charges with phonons. <i>Tc</i>(χ<sup>´</sup>) and <i>Tc</i>(ρ = 0) were in good agreement. An enhancement of the AC irreversibility line <i>H</i>(<i>t</i> = <i>Tp</i>/<i>Tc</i>) was observed due to [AO] treatment for <i>x</i> >; 0.5 indicating an improvement in the pinning properties. The data were analysed with the relation <i>H</i> = <i>K</i><sup>´</sup>(1-<i>t</i>)<i>n</i> . Remarkable correlations were observed between δ<i>Tc</i>(<i>x</i>)=<i>Tc</i>[<i>AO</i>]-<i>Tc</i>[<i>O</i>] and δ<i>K</i><sup>´</sup>(<i>x</i>); and between <i>Tc</i>(<i>x</i>) , <i>d</i>[<i>Cu</i>(2)-<i>Y</i>/<i>Sm</i>](<i>x</i>) distance and the number <i>psh</i>(<i>x</i>) of holes by Cu(2)-O<sub>2</sub> superconducting planes. A combination of several factors such as decrease in <i>d</i>[<i>Cu</i>(1)-(<i>Sr</i>/<i>Ba</i>)] for x >; 0.4; increase in cationic and chain oxygen ordering; p<sub>sh</sub> and in-phase purity for the [AO] samples may account for the observed data.</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'>annealing; barium compounds; electrical resistivity; electron-phonon interactions; flux pinning; high-temperature superconductors; magnetic susceptibility; samarium compounds; sintering; strontium compounds; superconducting transition temperature; yttrium compounds; (Y<sub>1-x</sub>Sm<sub>x</sub>)(SrBa)Cu<sub>3</sub>O<sub>6+z</sub>; AC magnetic irreversibility line; AC magnetic susceptibility; argon annealing; cationic ordering; chain oxygen ordering; electrical resistivity; heat treatment; high T<sub>c</sub> superconductors; material preparation; oxygen annealing; phonon-carrier charge interaction; pinning properties; solid-state sintering; Argon; Conductivity; Correlation; Heat treatment; Magnetic susceptibility; Superconductivity; Temperature measurement; <formula formulatype=$ $({rm Y}_{1-{rm x}}{rm Sm}_{rm x})({rm SrBa}){rm Cu}_{3}{rm O}_{6+{rm z}}$; Ceramic cuprites; chain oxygen order-disorder; heat treatments control of $T_{c}$; irreversibility line; resistivity;