Giant M-E effect of multiferroic BaTiO/sub 3/--LaMnO/sub 3/ ceramic composites
Giant M-E effect of multiferroic BaTiO/sub 3/--LaMnO/sub 3/ ceramic composites
复制标题
DOI：
10.1109/tmag.2005.854773
复制
发表时间：
2005-04
影响因子：
2.1
通讯作者：
K. Bán;M. Gomi;T. Shundo;N. Nishimura
中科院分区：
文献类型：
--
作者：
K. Bán;M. Gomi;T. Shundo;N. Nishimura
研究了在BaTiO/sub 3/中加入10 mol%反铁磁LaMnO/sub 3/的陶瓷复合材料的磁性能和介电性能。X射线衍射分析表明，在1050-1150/spl deg/C范围内烧结的陶瓷是含有少量（La，Ba）MnO/sub 3/相沿着BaTiO/sub 3/相的复合材料。这些复合材料被发现是多铁性材料，同时表现出铁磁和铁电性能在室温下。当2.3 kV/mm的电场施加到在1200/spl deg/C下烧结的复合材料上时，在室温下观察到自发磁化强度降低高达70%。这种还原可能是由于周围BaTiO/sub 3/基体的电致伸缩引起的沉淀铁磁（La，Ba）MnO/sub 3/的电子转移相互作用减弱所致。
The magnetic and dielectric properties of ceramic composites, in which 10 mol% antiferromagnetic LaMnO/sub 3/ was added to ferroelectric BaTiO/sub 3/, have been investigated. X-ray diffraction measurement showed that ceramics sintered in the range of 1050-1150/spl deg/C are composites containing a small amount of (La, Ba)MnO/sub 3/ phase along with BaTiO/sub 3/ phase. These composites were found to be multiferroic materials simultaneously exhibiting ferromagnetic and ferroelectric properties at room temperature. When an electric field of 2.3 kV/mm was applied to the composite sintered at 1200/spl deg/C, a reduction of spontaneous magnetization as large as 70% was observed at room temperature. This reduction may be ascribed to the decrease of electron transfer interaction of the precipitated ferromagnetic (La, Ba)MnO/sub 3/ caused by electrostriction of the surrounding BaTiO/sub 3/ matrix.