A new process to synthesize polycrystailine samples of Sr14Cu24O41 was presented. Firstly, dry gel powder of Sr14Cu24O41 was synthesized by the citrates sol-gel method, using Sr(NO3)2, Cu(NO3)2, ethylene glycol and citrate acid as raw materials. Then, polycrystalline samples of Sr14Cu24O41 were prepared by solid-state reaction. Thermal Gravimetric and Differential Thermal Analysis(TG-DTA) showed that the temperature for solid-state reaction is at 942 ℃. The samples are identified to be single phase by X-ray Diffraction(XRD)and Scanning Electron Microscopy(SEM). The SEM pictures showed that the first-step particles were at even size of about 100 nm'by this technique. The electronic transport measurements showed that the doping compound were semiconductor with a crossover temperature Tρin the Arrhenius plot of the resistivity versus temprature.
参考文献
[1] | McCarron E M;Subramanian M A;Calabrese J C et al.The Incommensurate Structure of (Sr14-xCax) Cu24O41(0x~8) A Superconductor Byproduet[J].Materials Research Bulletin,1988,23:1355-1365. |
[2] | Akimitsu J;Uehara M;Nagata T et al.Metal-insulator Transition in the S=1/2 Spin Ladder System(Sr0.4Ca0 6)14Cu24-xCoxO4-δ[J].Physica C,1996,263:475-481. |
[3] | Nücker N;Merz M;Kuntscher C A et al.Hole Distribution in (Sr,Ca,Y,La)14Cu24O41 Ladder Compounds Studied by X-ray Absorption Speetroseopy[J].Physical Review B:Condensed Matter,2000,62:14384-14392. |
[4] | Adachi T.;Kato M.;Noji T.;Koike Y.;Shiota K. .Electrical and magnetic anomalies in the spin-ladder cuprate Sr(14-x)A(x)Cu(24)O(41) (A=Ca, Y, La): Possibility of hole pairing in the ladder[J].Solid State Communications,1998(10):639-642. |
[5] | Carter S A;Batlogg B;Cava R J et al.Hole Doping of the CuO2 Chains in (La,Sr,Ca)14Cu24O41[J].Physical Review Letters,1996,77:1378-1381. |
[6] | Eccleston RS.;Takano M.;Azuma M. .NEUTRON-SCATTERING AND SUSCEPTIBILITY STUDY OF SPIN CHAINS AND SPIN LADDERS IN (SR0.8CA0.2)(14)CU24O41[J].Physical Review.B.Condensed Matter,1996(22):14721-14724. |
[7] | Blumberg G;Littlewood P;Gozar A et al.Sliding Density Wave in Sr14Cu24O41 Ladder Compound[J].Science,2002,297:584-587. |
[8] | Gozar A.;Blumberg G.;Littlewood PB.;Dennis BS.;Motoyama N.;Eisaki H. Uchida S. .Collective density-wave excitations in two-leg Sr14-xCaxCu24O41 ladders - art. no. 087401[J].Physical review letters,2003(8):7401-0. |
[9] | Uehara M;Nagata T;Akimitsu J et al.Superconductivity in the Ladder Material Sr0.4Ca13 6Cu24O41 84[J].Journal of the Physical Society of Japan,1996,65:2764-2767. |
[10] | Isobe M.;Onoda M.;Izumi F.;Nakano S.;Li JQ.;Matsui Y. Takayama-Muromachi E.;Matsumoto T.;Hayakawa H.;Ohta T. .Structural and electrical properties under high pressure for the superconducting spin-ladder system Sr0.4Ca13.6Cu24O41+delta[J].Physical Review.B.Condensed Matter,1998(1):613-621. |
[11] | Osada M.;Nagai I.;Noji T.;Adachi T.;Koike Y.;Backstrom J.;Kall M.;Borjesson L.;Kakihana M. .Raman-active phonons and their doping dependence in spin-ladder Sr14Cu24O41[J].Physica, C. Superconductivity and its applications,2000(1/2):161-165. |
[12] | Tsuji S;Kumagai K;Kato M et al.NMR Study on Spin Gap in Spin Ladder Sr14Cu24O41[J].Journal of the Physical Society of Japan,1996,65:3474-3477. |
[13] | Revcolevschi A.;Dhalenne C.;Ammerahl U. .Crystal growth of pure and substituted low-dimensionality cuprates CuGeO3, La2CuO4, SrCuO2, Sr2CuO3 and Sr14Cu24O41 by the floating zone and travelling solvent zone methods[J].Journal of Crystal Growth,1999(Pt.1):593-599. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%