Uniyal P, Yadav K L
Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India.
J Phys Condens Matter. 2009 Oct 7;21(40):405901. doi: 10.1088/0953-8984/21/40/405901. Epub 2009 Sep 14.
Pr modified Bi(0.9-x)La(0.1)Pr(x)FeO(3) (BLPFO-x, x = 0, 0.1 and 0.2) ceramics were prepared by the conventional method based on the solid state reaction of mixed oxides and a detailed study of electrical and magnetic properties of Pr modified bismuth ferrite (BLPFO) is reported. X-ray analysis shows the formation of a bismuth ferrite rhombohedral phase. Pr doping significantly increases the resistivity and leads to a successful observation of electrical polarization hysteresis loops. All the samples have been found to possess a spontaneous magnetic moment at room temperature which increases further at low temperatures. The strong dependence of remnant polarization and dielectric constant on the strength of magnetic field is a direct evidence of magnetoelectric coupling in BLPFO-2 ceramics.
采用基于混合氧化物固态反应的常规方法制备了Pr改性的Bi(0.9-x)La(0.1)Pr(x)FeO₃（BLPFO-x，x = 0、0.1和0.2）陶瓷，并报道了对Pr改性铋铁氧体（BLPFO）电学和磁学性能的详细研究。X射线分析表明形成了铋铁氧体菱方相。Pr掺杂显著提高了电阻率，并成功观察到电滞回线。发现所有样品在室温下都具有自发磁矩，且在低温下进一步增加。剩余极化和介电常数对磁场强度的强烈依赖性是BLPFO-2陶瓷中磁电耦合的直接证据。
