采用离子束溅射法在YSZ(110)衬底上制备Ln0.5Sr0.5CoO3(Ln=La,Pr)钙钛矿多晶薄膜,研究了载流子浓度、迁移率与温度的关系,分析了A位置稀土离子半径rA3+对电导率的影响.结果表明,在375K～667K温度范围内,La0.5Sr0.5CoO3薄膜的载流子浓度由4.76×1027/m3升高到9.43×1027/m3,迁移率由0.21cm2/Vs升高到0.218cm2/Vs;Pr0.5Sr0.5CoO3薄膜的载流子浓度由0.58×1027/m3升高到7.9×1027/m3,迁移率由0.0853cm2/Vs升高到0.172cm2/Vs.Ln0.5Sr0.5CoO3薄膜的霍尔系数激活能EH与电导激活能Eα的比值近似为2/3,符合Emin和Holstein的小极化子绝热区域导电理论.
参考文献
| [1] | Atsushi M;Masafumi K;Satoshi F et al.Metal-insulator transition and crystal structure of La1-xSrxCoO3 as function of Sr-content temperature and oxygen partial pressure[J].Journal of Solid State Chemistry,1999,142:374-381. |
| [2] | V. G. Prokhorov;Y. P. Lee;K. W. Kim;V. M. Ishchuk;I. N. Chukanova .Long-aging effects on the properties of La_(0.5)Sr_(0.5)CoO_(3-δ) films[J].Applied physics letters,2002(13):2353-2355. |
| [3] | Mineshige A.;Yao TS.;Ogumi Z.;Kikuchi K.;Kawase M.;Inaba M. .CRYSTAL STRUCTURE AND METAL-INSULATOR TRANSITION OF LA1-XSRXCOO3[J].International Journal of Quantum Chemistry,1996(2):423-429. |
| [4] | 丁铁柱,李健,其其格,季秉厚,刘健,张常在.XPS Studies on Rare Earth Oxide LSCO/YSZ Electrodes[J].稀土学报(英文版),2003(04):453-457. |
| [5] | T. Z. Ding;Y. M. Wang;S. H. Shi .Electrical transport behavior of perovskite-type oxide LSCO[J].Journal of Materials Science Letters,2003(1):1-3. |
| [6] | Wang Li;Yin Jiang;Huang Shaoyun et al.Thermally activated drift mobility and small polaron conduction in La0.7Sr0.11Ca0.14MnO3 thin films investigated by the traveling wave method[J].Physical Review B,1999,60(10):R6976-R6979. |
| [7] | Moos R;Menesklou W;Hardtl K H .Hall mobility of undoped n-type conducting strontium titanate single crystals between 19K and 1373K[J].Applied Physics A:Materials Science and Processing,1995,61:389-395. |
| [8] | Moos R.;Hardtl KH. .ELECTRONIC TRANSPORT PROPERTIES OF SR1-XLAXTIO3 CERAMICS[J].Journal of Applied Physics,1996(1):393-400. |
| [9] | 朱志强,丁铁柱,张利文,王强,赵倩.离子束溅射La0.5Sr0.5CoO3-δ薄膜的XRD和XPS研究[J].真空科学与技术学报,2006(06):494-499. |
| [10] | Lide M;Rodriguez M;Attfield J P .Cation disorder and size effects in magnetoresistive manganese oxide perovskites[J].Physical Review B,1996,54(22):R15622-R15625. |
| [11] | Shannon R D .Revised effective ionic radii and systematic studies of interatomie distances in halides and chaleogenides[J].Acta Crystallogra-phica Section A,1976,32:751-767. |
| [12] | Emin D;Holstein T .Studies of small-polaron motion IV.Adiabatic theory of the Hall effect[J].Annals of Physics(New York),1969,53:439-520. |
| [13] | Thakur JS;Naik R;Naik VM;Haddad D;Auner GW;Lu H;Schaff WJ .Temperature dependence of mobility and carrier density in InN films[J].Journal of Applied Physics,2006(2):23504-1-23504-5-0. |
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