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时间:2020-06-03
《铁电相BiFe03对多铁复合薄膜CoFe204-BiFe03铁磁性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、复舍材料学报第3O卷第5期10月2O13年袱凹V01.3ONo.5October2013文章编号:1000—3851(2013)05—0132—06铁电相BiFeO3对多铁复合薄膜CoFe2O4一BiFeO3铁磁性能的影响刘艳清,吴钰涵,张静,张永军(吉林师范大学功能材料物理与化学教育部重点实验室,四平136000)摘要:为了研究铁电相BiFeO。对复合薄膜磁性能的影响,在LaNiO。(LNO)缓冲层的Si(100)衬底上旋涂制备了含有0、6、9、10层等不同厚度BiFeO。的层状CoFeO一BiFeO。(CFO—BFO)多铁
2、复合薄膜。采用XRD、SEM以及TEM对其结构和形貌进行了表征,采用振动样品磁强计测量磁性,研究了不同厚度BFO对复合薄膜磁性的影响。结果表明:CFO和BFO在异质结构薄膜中共存。缓冲层LNO和铁磁相CFO薄膜具有精细微观结构及明显界面。铁电相BFO的厚度对CFO—BFO复合薄膜的磁性能产生了很大影响。在含有不同层数铁电相BFO的复合薄膜中,含有9层BFO复合薄膜的饱和磁化强度最大,达到了230emu·cm,相比无铁电相BFO的薄膜,饱和磁化强度提高了18.6V0。初步讨论认为:随着铁电相BFO厚度的增加,CFO与BFO之间的
3、应力传导引起了复合薄膜饱和磁化强度的提高。关键词:层状多铁复合薄膜;旋涂;BFO厚度;磁性;高分辨透射电子像;应力中图分类号:TB332文献标志码:AInfluenceoftheBiFeO3phaseonferromagnetpropertiesoflayeredmultiferroicCoFe204一BiFeO3filmsLIUYanqing,WUYuhan,ZHANGJing,ZHANGYongjun(KeyLaboratoryofFunctionMaterialsPhysicsandChemistryoftheMinis
4、tryofEducation,JilinNormalUniversity,Siping136000,China)Abstract:MuhiferroiclayeredfilmsconsistingofCoFe2O4一BiFeO3(CFO—BFO)withincreasingBFOconstituentlayersthicknesseswerepreparedontheLaNiO3(LNO)一bufferedSi(100)substrateviaasimplespincoatingprocessinordertOinvestig
5、atethethicknesseffectofferroelectricBiFeO3phaseonthemagneticpropertiesofthecompositefilms.ThestructureandmorphologywereresearchedbyXRD,SEMandTEM.Bisides,themagneticpropertiesweredemonstratedbyvibratingsamplemagnetometer(VSM)andtheeffectofdifferentthicknessesofBFOlay
6、eronthemagneticpropertiesofthecompositefilmswasdiscussed.TheresultsrevealthatmagneticCFOandferroelectricBFOphasescoexistintheheterostructuredfilms.ThebufferedlayerINOandferromagneticlayerCFOpossessclearmicrostruetureandobviousinterfacebetweenthem.ThethicknessofBiFeO
7、3phasehasasignificantinfluenceonthemagneticpropertiesoftheCFO—BFOfilms.AmongthemultiferroicfilmscontainingdifferentBF()layers,thefilmthatconsistingofnineBFOconstituentlayersdemonstratesthehighestMyvalueof230emu·cm~。,whichimproves18.6thanthatofthefilmwithoutBFOconsti
8、tuentlayers.WeinitiallyconcludethatitisstressthatleadstOtheimprovementofM。withincreasingtheBFOthickness.Keywords:layeredmultiferroicfilms;
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