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21.
Y. J. Uemura L. P. Le G. M. Luke B. J. Sternlieb J. H. Brewer J. Carolan W. Hardy R. Kadono R. F. Kiefl S. R. Kreitzman T. M. Riseman C. L. Seaman J. J. Neumeier M. B. Maple G. Saito H. Yamochi H. Takagi S. Uchida J. Gopalakrishnan M. A. Subramanian A. W. Sleight Gang Xiao 《Hyperfine Interactions》1991,63(1-4):131-137
We update our muon spin relaxation studies of the magnetic field penetration depth which show the correlations betweenT
c and the relaxation rate σ αn
s/m
* (carrier density/effective mass) of hole-doped high-T
c cuprate superconductors (La2, Sr3)CuO4, YBa2Cu3O7 (Y1−xPrx)Ba2Cu3O7, and other double and triple layer systems. These studies are extended to the organic superconductor (BEDT-TTF)2Cu(NCS)2. 相似文献
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A transition in BiVO4 crystals has been observed at 255°C. Optical and X-ray studies indicate that this is a ferroelastic transition of the type 4/m F2/m. 相似文献
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Uemura YJ Luke GM Sternlieb BJ Brewer JH Carolan JF Hardy WN Kadono R Kempton JR Kiefl RF Kreitzman SR Mulhern P Riseman TM Williams DL Yang BX Uchida S Takagi H Gopalakrishnan J Sleight AW Subramanian MA Chien CL Cieplak MZ Xiao G Lee VY Statt BW Stronach CE Kossler WJ Yu XH 《Physical review letters》1989,62(19):2317-2320
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H. Mizoguchi W.J. Marshall A.P. Ramirez A.W. Sleight M.A. Subramanian 《Journal of solid state chemistry》2007,180(12):3463-3468
Crystals of the mixed-valent compound were grown from a flux. The room temperature conductivity of a crystal was 3 S/cm but decreased smoothly with decreasing temperature to 10−5 S/cm at 25 K. Magnetic susceptibility data indicate a localized moment for Rh4+. A Seebeck coefficient at 200 K of +280 μV/K further confirms that this compound is a semiconductor rather than a metal with a partially filled 4d t2g band. A structure refinement based on single crystal X-ray diffraction data obtained at 173 and 296 K provided Rh–O distances sufficiently accurate to indicate the nature of the charge ordering between Rh3+ and Rh4+. The large Seebeck coefficient coupled with the high electrical conductivity indicates that this may be a promising low-temperature thermoelectric material. 相似文献
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Substitution of Mn(3+) into the trigonal-bipyramidal sites of oxides with YbFe(2)O(4)-related structures produces an intense blue color because of an allowed d-d transition. This has been demonstrated utilizing a variety of hosts including ScAlMgO(4), ScGaMgO(4), LuGaMgO(4), ScGaZnO(4), LuGaZnO(4), and LuGaO(3)(ZnO)(2). The hue of the blue color can be controlled by the choice of the host. 相似文献