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失配因子σ^2对掺杂锰基钙钛矿氧化物输运性质的影响 被引量:2

Effects of A-Cation Mismatch σ^2 on Transport Properties of Manganese Doped Oxide Perovskite
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摘要 掺杂量、A位阳离子平均半径及失配因子是影响掺杂锰基钙钛矿氧化物从顺磁绝缘体到铁磁金属转变的主要因素,为了突出研究失配因子的影响,本文固定掺杂量和A位阳离子平均半径制备了一系列样品。0和5 T磁场下电阻率与温度关系测量表明,随着失配因子的增加,绝缘体-金属转变温度向低温区移动且与σ2保持线性关系;通过调节失配因子,样品La0.53Sm0.17Sr0.3MnO3的磁电阻在室温附近达到了极大值。结合样品的电输运行为,对实验结果进行了讨论。 Three factors control the transition from paramagnetic insulator to ferromagnetic metal. The first is the hole doping. The second factor is the average ionic radius of the A site cation rA. The last one concerns the ionic size mismatch σ^2 at the A site. In order to study the effect of σ^2, a series of samples were prepared with constant value of x and rA. The measurement of resistivity versus temperature dependence under magnetic field (0 and 5 T) indicates that the insulator-metal transition temperature moves towards the low temperature region with increasing σ^2. The magnetoresistance of La0.53Sm0.17Sr0.3MnO3 obtains its maximum at room temperature. The experimental observation was discussed based on the measurement of the transport properties
出处 《中国稀土学报》 CAS CSCD 北大核心 2006年第5期576-579,共4页 Journal of the Chinese Society of Rare Earths
基金 国家自然科学基金资助项目(10374032)
关键词 失配因子 绝缘体-金属转变温度 磁电阻 稀土 ionic size mismatch ferromagnetic metallic to paramagnetic insulating transition MR rare earths
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参考文献17

  • 1Coey J M D,Viret M,Von Molnar S.Mixed-valence manganites[J].Adv.Phys.,1999,48:167.
  • 2彭振生.La_(2/3)Ca_(1/3)MnO_3中的输运机制与CMR效应[J].中国稀土学报,2003,21(6):664-667. 被引量:10
  • 3刘建,张炳哲,张伟,丁铁柱.(La_(1-x)RE_x)_(2/3)Sr_(1/3)MnO_3 (RE=Y, Sm, Eu, Tb; x=0.1~0.5)的晶体结构及磁性质研究[J].中国稀土学报,2004,22(6):765-768. 被引量:8
  • 4Hwang H Y,Cheong S W,Radaelli P G,et al.Lattice effects on the magnetoresistance in doped LaMnO3[J].Phys.Rev.Lett.,1995,75:914.
  • 5Millis A J.Lattice effects in magnetoresistive manganese perovskites[J].Nature,1998,392:147.
  • 6Millis A J,Littlewood P B,Shraiman B I,et al.Double exchange alone does not explain the resistivity of La1-xSrx MnO3[J].Phys.Rev.Lett.,1995,74:5144.
  • 7Sun J R,Rao G H,Zhang Y Z.Effects of inhomogeneous oxygen content in (La,Gd)0.7Ca0.3MnO3+δ perovskites[J].Appl.Phys.Lett.,1998,72:3208.
  • 8Sun J R,Rao G H,Liang J K,et al.Complex magnetic and electronic transport properties of (La,Gd)1-xSrxMnO3+ δ perovskites[J].Appl.Phys.Lett.,1997,71:3718.
  • 9Urushibara A,Moritomo Y,Asamitsu T,et al.Insulator-metal transition and giant magnetoresistance in La1-xSrxMnO3[J].Phys.Rev.B,1995,51:14103.
  • 10Schiffer P,Ramirez A P,et al.Low temperature magnetoresistance and the magnetic phase diagram of La1-x CaxMnO3[J].Phys.Rev.Lett.,1995,75:3336.

二级参考文献10

  • 1Tokura Y, Tomioka Y. Colossal magnetoresistive manganites [J]. J. Magn. Magn. Mater., 1999, (200): 1.
  • 2Chi E O, Kwon Y T, Kim J T, et al. Lattice effects on the magnetic and transport properties in La1.4Sr1.6-xAxMnO7(A = Ca Ba) [J]. Solid State Commun., 1999, (110): 569.
  • 3Urushibara A, Moritomo Y, Arima, et al. Insulator-metal transition and giant magnetoresistance [J]. Phys. Rev. B, 1995,(51): 14103.
  • 4Li X W, Gupta, Xiao G, et al. Low-field magnetoresistive properties of polycrystalline and epitaxial perovskite manganite films [J]. Appl. Phys. Lett., 1997, (71): 1124.
  • 5Sharma N, Nigam, A K, Pinto R, et al. Giant magnetoresistance studies on La(0.s-x)RxSr0.2MnO3 thin films (R = Pr, Nd,Gd, Ho) [J]. J. Magn. Magn. Mater., 1997, (166): 65.
  • 6Mitra C, Raychaudhuri P, Dhar S K, et al. Evolution of transport and magnetic properties with dysprosium doping in La0.7- xDyxSr0.3MnO3(x =0-0.4) [J]. J. Magn. Magn. Mater.,1999, (192): 130.
  • 7Wu W, Wong K H, Li X G, et al. Effect of annealing in reduced oxygen pressure on the electrical transport properties of epitaxialfilm and bulk (La1-xNdx)0.7Sr0.3MnO3[J]. J. Appl.Phys., 2000, (87): 3006.
  • 8Hwang H Y, Cheong S W, Radaelli P G, et al. Lattice effects on the magnetoresistance in doped LaMnO3 [J]. Phys. Rev.Lett., 1995, (75): 914.
  • 9Zhang N, Yang W, Ding W P, et al. Grain size-dependent magnetism in fine particle perovskite La1-xSrxMnO3[J]. Solid State Commun., 1999, (109): 537.
  • 10刘宁,孙勇,童伟,张裕恒.La_(0.67)Ca_(0.33)Mn_(1-x)Cr_xO_3(0.0≤x≤0.15)中异常的CMR效应[J].低温物理学报,2001,23(2):115-120. 被引量:18

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  • 1BELMEGUENAI M, DEVOLDER T, CHAPPERT C. Experimental analysis of the fast magnetization dynamics in high perpendicular anisotropy Co/Pt nanostructures[J]. J Magne Magne Mater, 2006, 307(2): 325-329.
  • 2GUO Z B, DU Y W, ZHANG J S, HUANG H, DING W P, FENG D. Large magnetic entropy change in perovskite-type manganese oxides[J]. Phys Rev Lett, 1997, 78(6): 1142-1145.
  • 3ZHONG W, WU X L, TANG N J,LIU W, CHEN W, AU C T, DU Y W. Magnetocaloric effect in ordered double-perovskite Ba2FeMoO6 synthesized using wet chemistry[J]. Eur Phys J B, 2004, 41(2): 213-217.
  • 4XU QY, GU K M, LIANG X L, NI G, WANG Z M, SANG H, DU Y W. Magnetic entropy change in La0.54Ca0.32MnO3-δ[J]. J Appl Phy, 2001, 90(1): 524-526.
  • 5ZHOU T J, YU Z, ZHONG W, XU X Z, ZHANG H H, DU Y W.Larger magnetocaloric effect in two-layered La1.6Ca1.4Mn2O7 polycrystal[J]. J Appl Phys, 1999, 85(11): 7975-7977.
  • 6GU Gang, CAI Jin-hua, YANG Wei, DU You-wei. Magnetotransport and magnetocaloric properties of La0.55Er0.05Ca0.4MnO3[J]. J Appl Phys, 1998, 84(7): 3798-3801.
  • 7ZHONG W, CHEN W, DING W P, DU Y W. Structure, composition and magnetocaloric properties in polycrystalline La1-xAxMnO3+δ(A=Na, K)[J]. Eur Phys J B, 1998, 35(3): 169-174.
  • 8ZHONG W, CHEN W, DING W P, ZHANG N, HU A, DU Y W, YAN Q J. Synthesis,structure and magnetic entropy change of polycrystalline La1-xKxMnO3+δ[J]. J Magne Magne Mater, 1999, 195(1): 112-118.
  • 9SUN W A, LI J Q, AO W Q, TANG J N, GONG X Z. Hydrothermal synthesis and magnetocaloric effect of La0.7Ca0.2Sr0.1MnO3[J]. Powder Technology, 2006, 166(2): 77-80.
  • 10CHERIF K, ZEMNI S, DHAHRI J, OUMEZZINE M, GHEDIRA M, VINCENT H. Magnetocaloric effect in the doped perovskite manganese oxide La0.7-xNdxSr0.3MnO3 (x=0.42, 0.56 and 0.7)[J]. J Alloy Compoun, 2005, 396(1/2): 29-33.

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