Jinrong Cheng, Jianguo Chen, D. Jin, Shengwen Yu, Z. Meng
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引用次数: 0
摘要
采用混合氧化物法制备了La和Ba改性(1-x)BiFeO3-xPbTiO3的固溶体。用10%的La3+和Ba2+取代离子分别取代Bi3+和Pb2+离子。这些阳离子进入晶格，改变了BiFeO3-PbTiO3的结构和性能。在x=0.4处出现(1-x)(Bi,La)FeO3-x(Pb,Ba)TiO3 (BLF-PBT)的亲晶相界，并伴有菱形-四方相转变。发现(1-x)BLF-xPBT在MPB附近表现出增强的铁电和磁性能。残余极化和磁化强度分别达到26 μ c /cm和0.06 μ u/g。结果表明，(1-x)Bi(Fe,Ga)O3-xPbTiO3是一种绝缘可切换的多铁质材料。
Multiferroic Properties of La, Ba Co-Modified BiFeO3-PbTiO3 Crystalline Solutions
Solid solutions of La and Ba modified (1-x)BiFeO3-xPbTiO3 were prepared by the mixed oxides method. The 10 at% of La3+ and Ba2+ substituents were utilized to substitute Bi3+ and Pb2+ ions respectively. These cations enter into the crystalline lattice to modify the structure and properties of BiFeO3-PbTiO3. The morphotropic phase boundary of (1-x)(Bi,La)FeO3-x(Pb,Ba)TiO3 (BLF-PBT) appears at x=0.4 accompanying by the rhombohedral-tetragonal phase transition. It is found that (1-x)BLF-xPBT reveals enhanced ferroelectric and magnetic properties in the vicinity of the MPB. The remnant polarization and magnetization achieve of 26 muC/cm and 0.06 emu/g, respectively. Our results indicated that (1-x)Bi(Fe,Ga)O3-xPbTiO3 is of the insulating and switchable multiferroics.
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