M. R. CIMBERLE

By applying the combustion synthesis technique on stoichiometric elemental powder compacts and subsequent suitable isothermal annealing treatements, the following three crystalline compounds were prepared: MgxCyNi3, MgNi2(C), Mg2Ni(C). The samples were analyzed by means of X-ray and synchrotron powder diffraction and scanning electron...

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The crystal and magnetic structure of (Ho0.50+xCa0.50-x)(Mn1-xCrx)O3 (x = 0:00, 0.01, 0.02, 0.03) has been investigated between 5 and 300 K by means of neutron powder diffraction followed by Rietveld refinement and dc magnetic measurements. During cooling an orthorhombic to monoclinic phase transition occurs on account of the charge and orbital...

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In the present paper we report a small angle neutron scattering (SANS) study of magnetic clusters formation in (Pr0.55Ca0.45)(Mn1yCry)O3 (y = 0.00, 0.03, 0.06) manganites which was performed by analyzing, above and below the magnetic phase transitions, the momentum transfer q dependence of the SANS intensity on temperature and on the applied...

The crystal and magnetic structures of the (La0.63Ca0.37)(Mn1xTMx)O3 compounds (x = 0.00, 0.03,0.08; TM = Cu2+, Ni2+) were investigated between 5K and 300K by means of dc magnetic measurements and neutron powder diffraction analysis followed by Rietveld refinement. Both substituting cations lead to a reduction of the long range ferromagnetic...

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In this paper we describe an apparatus for static measurements of the thermal conductivity of Bi(2223)/Ag-sheathed tapes in a temperature range going from 4K to 200K, The standard experimental technique has been improved by the implementation of an original sample arrangement that minimizes the thermal losses by radiation. We have performed a...

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SmFeAsO and the isostructural superconducting SmFeAs(O0.93F0.07) phase were prepared and characterized by means of Rietveld refinement of x-ray powder diffraction data, scanning electron microscope observation, transmission electron microscope analysis, and resistivity and magnetization measurements. Sintering treatment strongly improves the...

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