Pb_(1-x)Tb_xTi_(1-x)Mn_xO_3(0≤x≤0.10)固溶体的合成、结构与表征.pdf

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1、物理化学学~(WuliHuaxueXuebao1990ActaPhys．一Chim．Sin．2011，27(4)，990—994April[Article】WWW．whxb．pku．edu．caPbl-xTbxTitMnx03(OSxS_O．10)固溶体的合成、结构与表征范敏李国宝’王东伟。金头男，廖复辉’林建华(北京大学化学与分子工程学院，北京分子科学国家实验室，稀土材料化学及应用国家重点实验室，北京100871；北京工业大学材料科学与工程学院，北京100022；国家纳米科学中心，北京100190)摘要：用固相反应合成了Pb—Tb11，MnxO。(00．10)N溶体，并用X射线粉末衍射进

2、行了表征，室温下其空间群为P4mm．热分析仪测试结果显示．随着Tb和Mn掺杂量的增加，该固溶体的相变温度降低．介电常数在附近出现峰值，表明对应的相变是铁电相变．磁性测量显示，当x=0．08和x=0．10时，Pb一b『r

3、1_xMnO。分别在25和29K附近有顺磁性向反铁磁性的转变．关键词：固相反应PbTiO。：相变：铁电TbMnO中图分类号：O641Synthesis，StructureandCharacterizationofPb1_xTbxTi1Mn03(00．10)SolidSolutionsFANMinLIGuo．Bao’，WANGDong．Wei。JINTbuNan，LlAOFu

4、．Hui’LlNJian—Hua1_(Beo'ingNationalLaboratoryforMolecularSciences，StateKeyLaboratoryofRareEarthMaterialsChemistryandApplicationsCollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871，PR．China；CollegeofMaterialScienceandEngineering,BeijingUniversityofTechnology,Beij'ing100022,PR．Ch

5、ina；NationalCenterfo，NanoscienceandTechnolgy,Beijing100190,R．China1Abstract：SolidsolutionsofPb1一xTbTiMnO3fO≤xl

6、measurementswereperformedtoobtainphasetransitiontemperaturesf)forthesamples，andthesewerefoundtodecreasewithanincreasejntheamountofdopedTbandMn．Thetemperaturedependentdielectticconstantshowsapeakclosetothe，indicatingthatthecorrespondingphasetransitionisaferroelectricphasetransition．Magneticmeasurem

7、entsjndicatethataparamagnetictoantiferromagneticphasetransitionOCCURSat25and29KforPb1一xTb／riMO3withx=0．O8andx=0．10，respectively．KeyWords：Solid-statereaction；PbTiO3：Phasetransition；Ferroelectrics；TbMnOa1Introductionories．～ThepropertiesofPbTiO3areusuallymodifiedbydop-ingwithotherelements．一Forexample

8、．theferroelectricTheperovskiteferroelectricPbTiO3relatedmaterialshavebeenextensivelystudiedfortheirapplicationsinthefieldofphasetransitionofPbTiO3OCCURSarotmd490。Cfromcubicmodernsensors，transducers，ferroelectricr