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ID:37333709
大小:1.70 MB
页数:6页
时间:2019-05-21
《低氟MOD法银修饰YGdBCO多层厚膜制备》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、第37卷第5期低温物理学报Vol.37,No.52015年10月CHINESEJOURNALOFLOWTEMPERATUREPHYSICSOct2015低氟MOD法银修饰YGdBCO多层厚膜的制备*韩修林12222孙梅娟刘志勇白传易蔡传兵1阜阳师范学院物理与电子科学学院,安徽阜阳236037;2上海大学物理系,上海市高温超导重点实验室,上海200444收稿日期:2015-03-25;修回日期:2015-04-22【摘要】采用低氟MOD法在氧化物缓冲层哈氏合金基底上制备了不同结构的YGdBCO多层膜.分析研究了有银修饰与无银修饰YGdB
2、CO多层膜的微结构与性能,对比研究了银修饰在多层膜结构中的作用.XRD与SEM结果表明银修饰改变了YGdBCO生长的热力学参数,使得YGdBCO具有更好的c轴织构度,更为平整致密的表面形貌,并最终提高了YGdBCO的超导性能.为了进一步理解银修饰的作用,用经典成核理论分析了YGdBCO成核过程,按照经典成核理论a轴成核与c轴成核的竞争主要取决于过饱和度,银修饰可能降低了YGdBCO的过饱和度,因而扩大了YGdBCOc轴成核的窗口.关键词:MOD,多层,厚膜,YGdBCO,AgPACC:7470V,7475,7490DOI:10.133
3、80/j.cnki.chin.j.lowtemp.phys.2015.05.002AgDECORATINGEFFECTSONYGdBCOMULTILAYERTHICKFILMSDERIVEDBYLOW-FLUORINE*METALORGANICSOLUTIONDEPOSITION12222HANXiulinSUNMeijuanLIUZhiyongBAIChuanyiCAIChuanbing1SchoolofPhysicsandElectronicsScience,FuyangNormalcollege,AnhuiFuyang23603
4、7;2ShanghaiKeyLaboratoryofHighTemperatureSuperconductors,PhysicsDepartment,ShanghaiUniversity,Shanghai200444Receiveddate:2015-03-25;revisedmanuscriptreceiveddate:2015-04-22【Abstract】VariousartificialmultilayersconsistingofYGdBCOsuperconductingfilmswerefabricatedontheoxi
5、debufferedHastelloysubstratebylowfluorinemetalorganicdepositionmethod.MicroscopicandsuperconductingperformancesarestudiedonthecompositeYGdBCOmultilayerfilmswithandwithoutthealternativeultrathinlayersofAg,whichcomparativelyshowstheAgdecoratingeffectsinsucharchitectures.X
6、-raydiffractionandscanningelectronmicroscopyimpliesthatthegrowththermodynamicparametersoftheYGdBCOaremodified,resultinginabetterc-axisorientation,ahigherin-planetexture,aswellasasuperiorsurface,andfinallygiverisetomuchimprovementofsuperconductingperformance.Tounderstand
7、theaboveAgdecoratingeffectsfurther,thecriticalGibbsfreeenergy△G*(r)onthenucleationofMOD-YGdBCOfilmsonthebiaxiallytexturedbufferlayersisanalyzedwithrespecttotheadditionsofAg.Acoordingtoclassicalnucleationtheory,thecompetitionbetweena-*国家自然科学基金(批准号:11273008,51202141),上海市科
8、委(批准号:13111102300,14521102800)国家科技部(973)计划(批准号:2011CBA00105)资助的课题.*ProjectsupportedbytheNationalNaturalScience
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