New multidetectors and monochromators on ILL neutron powder diffractometers
Acta Crystallographica Section A: Foundations and advances International Union of Crystallography (IUCr) 52:a1 (1996) c34-c34
Structural 'tuning' of magnetism in A1−xA′xMnO3(A = La, Pr; A′ = Ca, Sr, Ba)
Acta Crystallographica Section A: Foundations and advances International Union of Crystallography (IUCr) 52:a1 (1996) c386-c386
Stripe structure of the CuO2 plane in Bi2Sr2CaCu2O8+y by anomalous x-ray diffraction.
Phys Rev B Condens Matter 54:6 (1996) 4310-4314
Gold substitution in mercury cuprate superconductors
Physica C: Superconductivity and its Applications 262:3-4 (1996) 151-158
Abstract:
By using the high-pressure high-temperature technique, we succeeded in substituting in the mercury cuprate superconductors up to about 40% of mercury by gold. The samples were studied by X-ray and neutron powder diffraction, electron microscopy, energy dispersive spectroscopy. AC suceptibility measurements were also performed. The experimental data obtained for the Au substituted Hg-1223 compound indicate that the substitution leads to overdoping of the CuO2 layers, with a progressive decrease of cell parameters and Tc with increasing gold content. Taking into account these results, we used gold substitution to increase Tc of a Hg-1245 sample up to 110 K. The corresponding unsubstituted samples are normally obtained by the high-pressure high-temperature technique in an underdoped state with a Tc around 100 K.Dependence of superconducting transition temperature on doping and structural distortion of the CuO2 planes in La2-xMxCuO4 (M=Nd, Ca, Sr).
Phys Rev Lett 76:8 (1996) 1348-1351