مرکز منطقه ای اطلاع رساني علوم و فناوري - Monte Carlo Simulation of the Vacancies and Thickness Effects on the Magnetic Behavior of La<formula formulatype="inline"> <img src="/images/tex/19028.gif" alt="_{0.67}"> </formula>Ca<formula formulatype="inline"> <img src="/images/tex/19029.gif" alt="

Title :

Monte Carlo Simulation of the Vacancies and Thickness Effects on the Magnetic Behavior of La $_{0.67}$ Ca $_{0</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'>Agudelo G, J.D. ; Restrepo-Parra, E. ; Restrepo, J.</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'>PCM Comput. Applic., Univ. Nac. de Colombia Sede Manizales, Manizales, Colombia</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'>48</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'>2012</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'>3/1/2012 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'>1110</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'>1114</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'>Monte Carlo simulations of La<sub>0.67</sub>Ca<sub>0.33</sub>MnO<sub>3</sub> thin films by using the Metropolis algorithm and a nearest neighbor classical Heisenberg model were carried out. Films were simulated by considering system sizes of L × L × d magnetic ions, being d the film thickness, which was varied, and L the linear dimension of the basal plane, which was kept fixed at a high enough value. In the simulation we have differentiated three types of ions, namely Mn<sup>4+d3</sup>, Mn<sup>3+eg</sup>, and Mn<sup>3+eg´</sup> with their corresponding coupling constants. Hence, the effect of substituting Mn ions by vacancies upon the magnetic properties of the films was addressed. Magnetization, magnetic susceptibility, and specific heat curves as a function of temperature were obtained. Results indicate that the paramagnetic to ferromagnetic transition temperature T<sub>c</sub> increases until reaching the value reported for the bulk material (~260 K) as the film thickness increases above 9 magnetic unit cells. Moreover, as the vacancies percentage increases, T<sub>c</sub> exhibits a linear decrease without depending of the sample thickness; this is caused by the decrease in the magnetic bonds density.</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'>Heisenberg model; Monte Carlo methods; calcium compounds; ferromagnetic materials; ferromagnetic-paramagnetic transitions; lanthanum compounds; magnetic susceptibility; magnetic thin films; magnetisation; paramagnetic materials; specific heat; vacancies (crystal); L×L×d magnetic ions; La<sub>0.67</sub>Ca<sub>0.33</sub>MnO<sub>3</sub>; Monte Carlo simulation; bulk material; coupling constants; magnetic bond density; magnetic properties; magnetic susceptibility; magnetic unit cells; magnetization; metropolis algorithm; nearest-neighbor classical Heisenberg model; paramagnetic-ferromagnetic transition temperature; specific heat curves; thickness effects; thin films; vacancies; Films; Ions; Magnetic properties; Manganese; Monte Carlo methods; Perpendicular magnetic anisotropy; Heisenberg; magnetic behavior; thin film; transition temperature; vacancies percentage;</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fLanguage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>English</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Journal_Title : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Magnetics, IEEE Transactions on</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Publisher : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>ieee</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>ISSN : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>0018-9464</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Type : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>jour</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>DOI : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>10.1109/TMAG.2011.2171356</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Filename : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>6111300</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Link To Document : </div><div class='valueDiv leftDirection leftAlign fullRecValueEnglish col-xs-8 col-sm-10'><a href='https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1405128' target='_blank'>https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1405128</a></div> </div> </div> <div class='leftDiv labelDiv leftAlign backLinkEnglish'><a href='javascript:history.back()'><img src='../CSS/Back.png' class='backImage' alt=$