Improving of the electrical and magnetic properties of BiFeO₃ by doping with yttrium

详细信息    查看全文

• 作者：Nikola I. Ilić^a ; ^{niksentije@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Jelena D. Bobić^a ; Bojan S. Stojadinović^b ; Adis S. Džunuzović^a ; Mirjana M. Vijatović Petrović^a ; Zorana D. Dohčević-Mitrović^b ; Biljana D. Stojanović^a ; ^{bstojanovic80@yahoo.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Chemical synthesis ; Impedance spectroscopy ; Electrical properties ; Ferroelectricity ; Multiferroics
• 刊名：Materials Research Bulletin
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：77
• 期：Complete
• 页码：60-69
• 全文大小：3220 K

文摘

Bismuth ferrite is one of the most promising multiferroic materials, and the main barriers for exploiting all of its specific properties are difficulties in obtaining pure, high resistive material with nanosized grains. Doping of BiFeO₃ with different transition metals and rare earth elements is often used way for overcoming these obstacles. Yttrium doped bismuth ferrite, Bi_1−xY_xFeO₃ (x = 0; 0.01; 0.03; 0.05; 0.1), was prepared by auto-combustion method. X-ray diffraction patterns and Raman results showed that partial phase transition from rhombohedral to orthorhombic structure took place at around 10 mol% of Y. Effect of Y doping on microstructure was studied from SEM micrographies, showing the reduction of grain size in doped samples. Electrical measurements showed continuous improvement of resistivity with Y doping, whereas the values of saturation and remnant polarizations exhibit maximums at around 5 mol% of Y. Yttrium doping also enhanced magnetic properties, leading to weak ferromagnetism.