Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Capogna, L."'
Autor:
Capogna, L., Granata, V., Ouladdiaf, B., Rodriguez-Velamazan, J. A., Fittipaldi, R., Vecchione, A.
We have investigated the metamagnetic-like transition in the triple layer ruthenate Sr4Ru3O10 by means of neutron diffraction from single crystals. The magnetic structure of the compound appears to be determined in a complex way by the two substructu
Externí odkaz:
http://arxiv.org/abs/1811.11065
Autor:
Baldini, M., Capogna, L., Capone, M., Arcangeletti, E., Petrillo, C., Goncharenko, I., Postorino, P.
Publikováno v:
J. Phys.: Condens. Matter 24 045601 (2012)
The pressure dependence of the Curie temperature T$_{C}(P)$ in La$_{0.75}$Ca$_{0.25}$MnO$_{3}$ was determined by neutron diffraction up to 8 GPa, and compared with the metallization temperature T$_{IM}(P)$ \cite{irprl}. The behavior of the two temper
Externí odkaz:
http://arxiv.org/abs/1112.1927
Publikováno v:
Phys. Rev. B 82, 014407 (2010)
Single-crystal neutron diffraction has been used to determine the incommensurate magnetic structure of NaCu2O2, a compound built up of chains of edge-sharing CuO4 plaquettes. Magnetic structures compatible with the lattice symmetry were identified by
Externí odkaz:
http://arxiv.org/abs/1004.5526
Autor:
Deen, P. P., Petrenko, O. A., Balakrishnan, G., Rainford, B. D., Ritter, C., Capogna, L., Mutka, H., Fennell, T.
We present the first neutron inelastic scattering results on the low temperature magnetic state of the three dimensional hyperkagom\'e compound Gd$_{3}$Ga$_{5}$O$_{12}$ (GGG). GGG is often classified as a strongly frustrated system with a manifold of
Externí odkaz:
http://arxiv.org/abs/1004.4140
Autor:
Kovaleva, N. N., Boris, A. V., Capogna, L., Gavartin, J. L., Popovich, P., Yordanov, P., Maljuk, A., Stoneham, A. M., Keimer, B.
The anisotropic complex dielectric response was accurately extracted from spectroscopic ellipsometry measurements at phonon frequencies for the three principal crystallographic directions of an orthorhombic (Pbnm) YTiO_3 single crystal. We identify a
Externí odkaz:
http://arxiv.org/abs/0811.4404
Publikováno v:
Phys. Rev. Lett. 101, 047202 (2008)
Neutron diffraction has been used to determine the magnetic structure of Na$_8$Cu$_5$O$_{10}$, a stoichiometric compound containing chains based on edge-sharing CuO$_4$ plaquettes. The chains are doped with 2/5 hole per Cu site and exhibit long-range
Externí odkaz:
http://arxiv.org/abs/0808.1009
Autor:
Capogna, L., Martinelli, A., Francesconi, M. G., Radaelli, P. G., Carvajal, J. Rodriguez, Cabeza, O., Ferretti, M., Castellano, C., Corridoni, T., Pompeo, N.
The crystal and magnetic structure of (La0.70Ca0.30)(CryMn1-y)O3 for y = 0.70, 0.50 and 0.15 has been investigated using neutron powder diffraction. The three samples crystallize in the Pnma space group at both 290 K and 5 K and exhibit different mag
Externí odkaz:
http://arxiv.org/abs/0801.4683
Autor:
Fauqué, B., Sidis, Y., Capogna, L., Ivanov, A., Hradil, K., Ulrich, C., Rykov, A. I., Keimer, B., Bourges, P.
Publikováno v:
Phys. Rev. B 76, 214512 (2007)
We report a neutron scattering study of the spin excitation spectrum in the superconducting state of slightly overdoped Bi2Sr2CaCu2O8+d system (Tc=87 K). We focus on the dispersion of the resonance peak in the superconducting state that is due to a S
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701052
Autor:
Capogna, L., Fauque, B., Sidis, Y., Ulrich, C., Bourges, P., Pailhes, S., Ivanov, A., Tallon, J. L., Liang, B., Lin, C. T., Rykov, A. I., Keimer, B.
We present inelastic neutron scattering data on highly overdoped Bi_2 Sr_2 Ca Cu_2 O_{8+\delta} single crystals with superconducting transition temperature T_C=70 K and, for comparison, a nearly optimally doped crystal with T_C=87 K. In both samples,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610869
Autor:
Choi, K. -Y., Gnezdilov, V. P., Lemmens, P., Capogna, L., Johnson, M. R., Sofin, M., Maljuk, A., Jansen, M., Keimer, B.
Publikováno v:
Phys. Rev. B 73, 094409 (2006)
We report an inelastic light scattering study of single-crystalline NaCu$_2$O$_2$, a spin-chain compound known to exhibit a phase with helical magnetic order at low temperatures. Phonon excitations were studied as a function of temperature and light
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511116