NAPOLETANO , Myrta

In the last years, the study of Fe-based magnetic nanoparticles (MNP) has attracted increasing interest either for the physical properties shown by nanosized materials (electric and magnetic properties are strongly affected by dimension and surface effects) either for the different technological applications of these materials (catalysis, drug...

Several samples of the La2-xSrxCuO4 (or LaSCO) and La2-xBaxCuO4 (or LaBCO) cuprate families with stoichiometries within the 0 less than or equal to x less than or equal to 0.125 region have been synthesised by conventional solid state reaction at 1273 K. They were characterised by X-ray diffraction (XRD), Rietveld refinement analysis and FT-IR...

Experimental studies of the physical properties of the three equiatomic compounds GdMgX (X = Al, Ga, In) are reported. GdMgAl (MgCu2-type structure) orders ferromagnetically below 59 K. Between 70 and 300 K it follows the Curie-Weiss law with μeff = 8.59 μB and θP = +70 K. The magnetization, in the ordered state, saturates almost completely at...

Abstract The ageing effects due to the interaction with typical working fluids (water and air) of magnetic refrigerant materials have been analysed for up to one year. Among the many compounds reported to exhibit a sufficiently high magnetocaloric effect, we decided to artificially age Gd, which represents the first choice high magnetocaloric...

We have studied the complex magnetic ordering of the Dy sublattices in orthorhombic Dy3Ag4Sn4 by high-resolution neutron diffraction and Sn-119 Mossbauer spectroscopy. Magnetic ordering in this compound occurs over two transitions. At 16 K the Dy( 2d) site orders in a doubled commensurate antiferromagnetic structure described by a propagation...

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