本文采用了改进的动态测量方法,对高温超导体的霍尔效应与温度的关系进行了测量.该方法有效地降低了测量误差,并且简单快速.我们利用低廉、普及的普通电磁铁代替了液氦制冷的低温超导磁体,测量了高温超导体YBa2Cu3O7(YBCO)薄膜和Hg1-xBa2CaCu2O6+δ(Hg-1212)薄膜的霍尔效应.发现了在Hg-1212中,随汞的含量不同,超导临界温度Tc变化很大,但是霍尔角却几乎不变.相反,随氧的含量不同,霍尔角变化很大,而超导临界温度T却变化很小.Tc的变化被认为与CuO2面上的单胞空穴密度Psheet相关联.这对了解高温超导的机制很有意义.
参考文献
| [1] | L J Van der pauw .A method of measuring the resistivity and Hall coefficient on lamellae of arbitrary shape[J].Philips Technological Review,1958(20):220. |
| [2] | L J Van der pauw .Determinationof resistivity tensor and Hall tensorof anisotmpic conductors[J].Philips Research Reports,1961(16):187. |
| [3] | S G Zybmev;V 1 Nizhankovkii;S F Kim.ReM-time Hall effect measurements of high critical currents epitaxial YBa2Cu3O7 x thin films[J].PHYSICA C,1997:1203. |
| [4] | J M Harris;Y F Yan;NPOng .Experimenml testof the T2lawfor theHall angle from Tc to500Kinoxygen-reduced YBa2Cu3O6+x crystals[J].Physical Review,1992,B46:14293. |
| [5] | T Ito;K Takenaka;SUchida .Systematic deviation from T-linear behavior in the in-plane resistivity of YBa2Cu3 -xZnx O7-y:Evidence for dcmimnt spin scattering[J].Physical Review Letters,1993,70:3995. |
| [6] | E V Antipov;J J Capponi;CChaillout .Synthesis and neutton powder diffraction study of the superconductor HgBa2CaCu2O6+ δ before and after heat treatment[J].PHYSICA C,1993,218:348. |
| [7] | Y Sun;J D Guo;XLXu .Superconducting HgBa2CaCu2Oy thin films growth on NdGaO3,SrTiO3,LaAlO3 and Y-ZrO2 substrates[J].PHYSICA C,1999,312:197. |
| [8] | I Francois;C Jaekel;GKyas;D.Dierickx, O.Van der Biest, R.M.Heeres, V.V.Moshchalkov, Y.Bruynseraede, H.G.Roskos, G.Borghs, H.Kurz .Influence of Pr doping and cxygen deficiency on the scattering behavior of YBa2Cu3O7thin films[J].Physical Review,1996,B53:12502. |
| [9] | Wu Jiang;J L Peng;SJHagen;R.L.Greene .Hall-effect studies of Y1 xPrxBa2Cu3O7 crystals[J].Physical Review,1992,B46:8694. |
| [10] | A Carrington;A P Mackenzie;CTLin;J.R.Cooper .Temperature dependence of the Hall angle in single-srystal YBa2(Cu1-xCox)3O7-δ[J].Physical Review Letters,1992(69):2855. |
| [11] | B Wuyts;V V Moshalkov;Y Bruynseraede .Resisfvity and Hall effect of metallic oxygen-deficient YBa2Cu3Ox films in the nomal state[J].Physical Review,1996,B53:9418. |
| [12] | T R Chien;Z Z Wang;N P Ong .Effect of Zn impurities on the norml-stateHall angle in single-crystal YBa2Cu3 -xZnxO7 δ[J].Physical Review Letters,1991,67:2088. |
| [13] | M D Lan;J Z Liu;YXJia;Lu Zhang, R.N.Shelton .Normal-stateHall effectinYBa2Cu3-xFexOb-δsingle crystals[J].Physical Review,1994,B49:580. |
| [14] | J M Harris;H Wu;NPOng;R.L.Meng, C.W.Chu .Hall-effect measurement of HgBa2CaCu2O6+[J].Physical Review,1994,B50:3246. |
| [15] | S Uchida.Spin gap effects on the c-axisandin-planechargedynamicsofhigh-T[J].cuprates PhysicaC,1997:12. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%