High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of Y(2)Ba(4)Cu(n)O2(2n+x), HgBa2Can-1CunO2n+2+delta and quasi-one-dimensional cupratesстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of y(2)ba(4)cu(n)o2(2n+x), hgba2can-1cuno2n+2+delta and quasi-one-dimensional cuprates / J. Karpinski, G. I. Meijer, H. Schwer et al. // Superconductor Science and Technology. — 1999. — Vol. 12, no. 9. — P. R153–R181. In this paper we present a review of high-gas-pressure single crystal growth studies of YBa2Cu4O8 and Y2Ba4Cu7O15-x performed in oxygen pressure up to 3000 bar and Hg1-xMxBa2Can-1CunO2n+2+delta (M = Pb, Re; n = 1-7) compounds in argon pressure up 11 000 bar at temperature up to 1200 degrees C. Chain compounds A(1-x)CuO(2) (A = Sr, Ca, Ba) have been synthesized at high oxygen pressure up to 2000 bar. High-pressure phase diagram studies of the investigated systems are also discussed. Structure analyses of Y2Ba4CunO2n+x (n = 6-8), Hg1-xMxBa2Can-1CunO2n+2+delta (M = Pb, Re; n = 1-8), Sr0.73CuO2 and (Sr,Ca)(4)Cu6O10 single crystals have been performed. The effects of substitutions and trends in bondlengths are discussed. The vortex state properties of HgBa2Ca2Cu3O8+delta and YBa2Cu4O8 single crystals are compared. For Hg-based compounds, the influence of oxygen content, chemical substitutions and radiation defects on vortex pinning were determined. The quasi-one-dimensional cuprates Ca0.83CuO2 and Sr0.73CuO2 show an antiferromagnetically ordered state of long-range 3D character at T < 10 K. The spin dynamics of Sr0.73CuO2 , measured by inelastic neutron scattering, indicate that this ordered state coexists with a dimerized singlet ground state. [ DOI ]

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