用固相烧结的方法成功制备了层状钙钛矿锰氧化物La1.2Sr1.8Cu0.04Mn1.96O7多晶样品. 研究发现, 在层状钙钛矿La1.2Sr1.8Mn2O7 中, 用Cu替代Mn对其磁、电的性质影响非常显著. 随温度的降低样品表现出从顺磁(PM)到铁磁(FM)及自旋玻璃态(SG)等复杂的磁相变行为. 电性测量表明, 在整个观察的温区内都表现出绝缘体或半导体的性质. 对电阻率-温度曲线进行拟合表明: 在低温区采用变程跳跃模型和在高温区采用小极化子模型都得到了较好的线性关系.
参考文献
| [1] | McAllister Judith A;Paul Attfield J .Systematic cation disorder effects in L1.85M0.15CuO4 superconductors[J].Physical Review Letters,1999,83:3289. |
| [2] | Kimura T;Tomioka Y;Kuwahara H et al.Interplane tunneling magnetoresistance in a layered manganite crystal[J].Science,1996,274:1698. |
| [3] | 钟伟,吴小玲,姜洪英,汤怒江,都有为.碱金属掺杂ABO3和A3B2O7型钙钛矿磁卡、磁电阻效应研究[J].稀有金属,2003(05):540-543. |
| [4] | Cai JW;Wang C;Shen BG;Zhao JG;Zhan WS;; .Colossal magnetoresistance of spin-glass perovskite La0.67Ca0.33Mn0.9Fe0.1O3[J].Applied physics letters,1997(12):1727-1729. |
| [5] | 李宝河,鲜于文旭,张健,马廷钧.钙钛矿型稀土锰氧化物La0.7Sr0.3FexMn1-xO3的磁性和巨磁电阻效应[J].中国稀土学报,2001(02):174-177. |
| [6] | Tong W.;Tang YJ.;Liu XM.;Zhang YH. .Charge-order melting and phase separation in La0.5Ca0.5Mn1-xTixO3 - art. no. 134435[J].Physical review, B. Condensed matter and materials physics,2003(13):4435-0. |
| [7] | Verma D;Nigam A K;Gundu Rao T K et al.Magnetic and transport studies in La1-xCaxMn0.7Co0.3O3 (0.1≤x≤0.5)[J].Journal of Magnetism and Magnetic Materials,2004,271:172. |
| [8] | Biswas Subhayan;Chatterjee Sandip;Chatterjee P et al.Exact solution of a two-component Calogero-Sutherland model with molecular field[J].Physical Review,2002,B66:14403. |
| [9] | Ganguly R.;Maignan A.;Hervieu M.;Raveau B.;Martin C. .Ruthenium doping of the layered charge ordered manganites, La0.5Sr1.5MnO4 and LaSr2Mn2O7[J].Solid State Communications,2001(9/10):363-368. |
| [10] | Dho Joonghoe;Kim W S;Hur N H .Reentrant spin glass behavior in Cr-doped perovskite manganite[J].Physical Review Letters,2002,89:027202. |
| [11] | De Teresa J M;Ibarra M R;Garci'a J et al.Spin-glass insulator state in (Tb-La)2/3Ca1/3MnO3 perovskite[J].Physical Review Letters,1996,76:3392. |
| [12] | Sundaresan A.;Raveau B.;Maignan A. .SPIN-GLASS STATE AND MAGNETIC-FIELD-INDUCED PHENOMENA IN DISTORTED EU0.58SR0.42MNO3 PEROVSKITE[J].Physical Review.B.Condensed Matter,1997(9):5596-5599. |
| [13] | Zhang X X;Yu R H;Tejada J et al.Magnetic properties and giant magnetoresistance in La0.67Ca0.33MnOx bulk material[J].Applied Physics Letters,1996,68:3191. |
| [14] | 谈国太,段苹,戴守愚,陈正豪,吕惠宾,周岳亮.La1-xTexMnO3（x=0.04,0.1）的庞磁电阻效应及自旋玻璃态特性[J].科学通报,2003(11):1139-1142. |
| [15] | Wang XL.;Liu HK.;Dou SX.;Horvat J. .Spin-glass state in Y0.7Ca0.3MnO3[J].Journal of Magnetism and Magnetic Materials,1998(1/2):L1-L4. |
| [16] | Pi L;Xu X J;Zhang Y H .Anomalous transport properties of heavily doped polycrystalline La0.825Sr0.175Mn1-xCuxO3[J].Physical Review,2000,B62:5667. |
| [17] | Zhang J.;Zhang PL.;Yan QW.;Wang FW. .Effect of lanthanide substitution on structure and magnetic properties in layered perovskite La1.2Sr1.8Mn2O7[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2000(1):6-9. |
| [18] | Zhang J.;Zhang P.;Yan Q.;Wang F. .Magnetoresistance in layered perovskites La1.2-xNdxSr1.8Mn2O< sub>7[J].Solid State Communications,1999(6):401-405. |
| [19] | Yuan S L;Yang Y P;Xia Z C et al.Unusual hysteresis and giant low-field magnetoresistance in polycrystalline sample with nominal composition of La2/3Ca1/3CuxMn1-xO3[J].Physical Review,2002,B66:172402. |
| [20] | Mott N F;Davis E A.Electronic Processes in Noncrystalline Materials[M].Oxford:Clarendon Press,1979 |
| [21] | Millis AJ. .COOPERATIVE JAHN-TELLER EFFECT AND ELECTRON-PHONON COUPLING IN LA(1-X)A(X)MNO(3)[J].Physical Review.B.Condensed Matter,1996(13):8434-8441. |
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