مرکز منطقه ای اطلاع رساني علوم و فناوري - Synthesis and Magnetic Properties of <formula formulatype="inline"> <img src="/images/tex/19603.gif" alt="\\hbox {BiFeO}_{3}"> </formula>, <formula formulatype="inline"> <img src="/images/tex/19669.gif" alt="{(\\hbox {BiFeO}_{3})}_{0.95}{(\\hbox {BaTiO}

Title :

Synthesis and Magnetic Properties of $\\hbox {BiFeO}_{3}$ , ${(\\hbox {BiFeO}_{3})}_{0.95}{(\\hbox {BaTiO}_{</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'>Chen, H.-Y. ; Tu, C.S. ; Wang, T.-H. ; Ding, Y. ; Liao, T.C. ; Jou, L.S. ; Jou, F.F. ; Yao, Y.D.</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 Phys., Fu Jen Catholic Univ., Taipei, Taiwan</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'>47</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'>3/1/2011 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'>706</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'>709</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'>Magnetization, grain size, structure, and temperature-dependent dielectric permittivity of BiFeO<sub>3</sub>, (BiFeO<sub>3</sub>,<sub>0.95</sub>(BaTiO<sub>3</sub>)<sub>0.05</sub> -(BaTiO<sub>3</sub>)0.05(5%BTO-BFO), and (Bi<sub>0.95</sub>Ba<sub>0.05</sub>)(Fe<sub>0.95</sub>Ti<sub>0.05</sub>)O<sub>3</sub>[5%(Ba, Ti)-BFO] ceramics have been carried out. BFO and 5%BTO-BFO exhibit an typical antiferromagnetic behavior, whose magnetization curve is linear with magnetic field at room temperature. The magnetic hysteresis loop of 5%(Ba,Ti)-BFO ceramic shows a weak ferromagnetic behavior with a small remanent magnetization of about 0.01 emu/g possibly due to a higher density in the grain matrix. This result also implies that the A-and B-site substitutions with Ba<sup>2+</sup> and Ti<sup>4+</sup> could efficiently suppress the spiral magnetic modulation. The magnetic susceptibilities of BFO, 5%BTO-BFO, and 5%(Ba,Ti)-BFO ceramics are about 1.9 × 10<sup>-5</sup>, 5.43 × 10<sup>-6</sup>, and 8.67 × 10<sup>-6</sup> emu/gOe, respectively. Frequency-dependent dielectric maxima were observed in BFO, 5%BTO-BFO, and 5%(Ba,Ti)-BFO ceramics upon heating. This dielectric response is likely triggered by the antiferromagnetic-paramagnetic transition near the Neel temperature.</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'>Neel temperature; barium compounds; bismuth compounds; ceramics; ferromagnetic materials; grain size; heat treatment; magnetic hysteresis; magnetic susceptibility; materials preparation; paramagnetic-antiferromagnetic transitions; permittivity; remanence; (Bi<sub>0.95</sub>Ba<sub>0.05</sub>)(Fe<sub>0.95</sub>Ti<sub>0.05</sub>)O<sub>3</sub>; (BiFeO<sub>3</sub>)<sub>0.95</sub>(BaTiO<sub>3</sub>)<sub>0.05</sub>; A-site substitutions; B-site substitutions; BiFeO<sub>3</sub>; Neel temperature; antiferromagnetic behavior; antiferromagnetic-paramagnetic transition; ceramics; ferromagnetic behavior; frequency-dependent dielectric maxima; grain size; heating; magnetic field; magnetic hysteresis loop; magnetic properties; magnetic susceptibilities; remanent magnetization; spiral magnetic modulation; temperature 293 K to 298 K; temperature-dependent dielectric permittivity; Bismuth; Ceramics; Dielectrics; Frequency modulation; Iron; Magnetic hysteresis; Magnetization; <formula formulatype=$ $({rm Bi}_{0.95}{rm Ba}_{0.05})({rm Fe}_{0.95}{rm Ti}_{0.05}){rm O}_{3}$; ${rm BiFeO}_{3}$; ${({rm BiFeO}_{3})}_{0.95}hbox{-}{({rm BaTiO}_{3})}_{0.05}$; dielectric permittivity; grain size; magnetization; structure;