Misaligned AGN with Fermi-LAT: A different perspective on relativistic jets

We review the latest results on misaligned AGNs (MAGNs), i.e. radio sources with the jet pointed away from the observer, detected by the Large Area Telescope (LAT) on board the Fermi satellite. We have analyzed the spectral properties in the γ-ray band of a sample of eleven radio sources, associated with the 3CR, 3CRR and Molonglo 4 Jy catalogues. The location of the γ-ray emission, the radiative processes responsible for it and the emerging jet structure are discussed in the framework of unification schemes for radio-loud AGNs. The results of a dedicated study on the nuclear spectral energy distribution (SED) of the radio galaxy NGC6251, one of the MAGNs of the LAT sample, are also presented

Critical chain length and superconductivity emergence in oxygen-equalized pairs of YBa2Cu3O6.30

The oxygen-order dependent emergence of superconductivity in YBa2Cu3O6+x is studied, for the first time in a comparative way, on pair samples having the same oxygen content and thermal history, but different Cu(1)Ox chain arrangements deriving from their intercalated and deintercalated nature. Structural and electronic non-equivalence of pairs samples is detected in the critical region and found to be related, on microscopic scale, to a different average chain length, which, on being experimentally determined by nuclear quadrupole resonance (NQR), sheds new light on the concept of critical chain length for hole doping efficiency.Comment: 7 RevTex pages, 2 Postscript figures. Submitted to Phys. Rev.

Synthesis and characterization of multiferroic BiMn7_7O12_{12}

We report on the high pressure synthesis of BiMn$_7$O$_{12}$, a manganite displaying a "quadruple perovskite" structure. Structural characterization of single crystal samples shows a distorted and asymmetrical coordination around the Bi atom, due to presence of the $6s^{2}$ lone pair, resulting in non-centrosymmetric space group Im, leading to a permanent electrical dipole moment and ferroelectric properties. On the other hand, magnetic characterization reveals antiferromagnetic transitions, in agreement with the isostructural compounds, thus evidencing two intrinsic properties that make BiMn$_7$O$_{12}$ a promising multiferroic material.Comment: 4 pages, 3 figure

AFS Pool Account Users - GSSKLOG and LCMAPS extension to support AFS users as EGEE pool account users

This paper describes the extensions to the gssklog and lcmaps packages that make possible the utilization of AFS users as LCMAPS/VOMS pool account users. This work has been performed in the framework of the integration of ENEA-GRID and EGEE infrastructure

The Gateway approach providing EGEE/GLITE access to non-standard architectures

This paper describes the gateway architecture and the required modifications to the gLite Middleware to make available to the GRID computing machines whose hardware/software architecture is non directly supported by gLite. This work has been performed in the framework of the integration of ENEA-GRID and EGEE infrastructure