PbTiO3-CoFe2O4复合薄膜的溶液法制备及其微观结构研究  

Preparation and Microstructure of PbTiO_3-CoFe_2O_4 Composite Thin Films by Solution Method

作　　者：刘敬松[1] 许有超[1] 李涛[1] 于技强[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室一省部共建国家重点实验室培育基地,绵阳621010

出　　处：《人工晶体学报》2011年第2期470-473,485,共5页Journal of Synthetic Crystals

基　　金：四川省教育厅青年基金(09ZB095);西南科技大学博士启动基金(08ZX7111)

摘　　要：以乙二醇甲醚为溶剂,采用溶液法成功制备了致密的、铁电相和铁磁相共存的0-3型磁电复合薄膜。采用X射线衍射(XRD)、原子力显微镜(AFM)、X射线能谱分析(EDAX)、压电响应力显微镜(PFM)分析了退火时间对两相结构、晶粒大小、薄膜形貌、电畴及磁畴的影响。结果表明,退火20 min对于PbTiO3相晶粒的生长已经足够,随着退火时间的延长,CoFe2O4相的晶粒逐渐长大,薄膜的均方根粗糙度有所提高;同时因为磁性相晶粒的长大复合薄膜电畴的取向发生了极大地变化。复合薄膜中同时存在的电畴和磁畴证明了其同时具有的铁电性和磁性。0-3 type magnetoelectric composite thin films of PbTiO3 ferroelectric phase and CoFe2O4 ferromagnetic phase coexisting were successfully prepared by chemical solution deposition（CSD） method using 2-methoxyethanol as solvent.The films have smooth and uniform surface,and compact fracture surface morphologies.The effect of annealing time on the grain size,phase structures,morphologies,ferroelectric and magnetic domains of the composite thin films were characterized by X ray diffraction（XRD）,atomic force microscope（AFM）,energy dispersive X-ray analysis（EDAX） and piezoresponse force microscope（PFM）.The results showed that annealing for 20 min is enough for the growth of PbTiO3 grains.As the annealing time increasing,the grain size of CoFe2O4 phase increased,and the root-mean-square of these thin films were enhanced.As a result,the domain orientation of the composite thin films reoriented.Coexisting of ferroelectricity and magnetic has been proven by simultaneous observation of ferroelectric and magnetic domains.

关 键 词：钛酸铅 铁酸钴 溶液法 微观结构 

分 类 号：TM22[一般工业技术—材料科学与工程]