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Your search keyword '"F. M., Granozio"' showing total 4 results
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4 results on '"F. M., Granozio"'

1. Tunnel and electrostatic coupling in graphene-LaAlO3/SrTiO3 hybrid systems

Author

I. Aliaj, I. Torre, V. Miseikis, E. di Gennaro, A. Sambri, A. Gamucci, C. Coletti, F. Beltram, F. M. Granozio, M. Polini, V. Pellegrini, and S. Roddaro

Subjects
Biotechnology, TP248.13-248.65, Physics, QC1-999
Abstract

We report on the transport properties of hybrid devices obtained by depositing graphene on a LaAlO3/SrTiO3 oxide junction hosting a 4 nm-deep 2-dimensional electron system. At low graphene-oxide inter-layer bias, the two electron systems are electrically isolated, despite their small spatial separation. A very efficient reciprocal gating of the two neighboring 2-dimensional systems is shown. A pronounced rectifying behavior is observed for larger bias values and ascribed to the interplay between electrostatic field-effects and tunneling across the LaAlO3 barrier. The relevance of these results in the context of strongly coupled bilayer systems is discussed.

Published
2016
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2. Effect of strain in La0.7Sr0.3MnO3 epitaxial films with different crystallographic orientation

Author

Paolo Perna, Antonio Ruotolo, R. Di Capua, B. Davidson, G. Pepe, F. Miletto Granozio, U. Scotti di Uccio, Marco Salluzzo, SCOTTI DI UCCIO, Umberto, Davidson, B., Di Capua, R., Miletto Granozio, F., Pepe, G., Perna, P., Ruotolo A, A., Salluzzo, M., U. S., Di, B., Davidson, R. D., Capua, F. M., Granozio, Pepe, GIOVANNI PIERO, P., Perna, A., Ruotolo, and M., Salluzzo

Subjects
Materials science, Condensed matter physics, Mechanical Engineering, Metals and Alloys, Magnetostriction, Manganite, Condensed Matter::Materials Science, Crystallography, Magnetization, Paramagnetism, THIN-FILMS, Ferromagnetism, Mechanics of Materials, Phase (matter), Materials Chemistry, Curie temperature, Condensed Matter::Strongly Correlated Electrons, Anisotropy
Abstract

We investigated the role of strain on the magnetic properties of La0.7Sr0.3MnO3 epitaxial films grown on substrates with different crystallographic orientation. The magnetic characterization confirms the large magnetostriction due to the tensile stress applied by the SrTiO3 substrates. The data demonstrate that the easy direction of magnetization is aligned to the elongated, in-plane axis both in (110)- and (001)-oriented films. The in-plane anisotropy of (110) films is interpreted in the frame of a simple structural model. We provide evidence of a spatial separation between a conducting ferromagnetic and an insulating paramagnetic phase at the Curie temperature. The possible effect of such phase separation on the coercitive field and on the magnetization versus temperature is discussed. (c) 2006 Elsevier B.V. All rights reserved.

Published
2006
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3. In situ superconducting Y−Ba−Cu−O thin films by single-target r.f. magnetron sputtering

Author

F. Tafuri, F. Miletto Granozio, G. Peluso, A. Di Chiara, U. Scotti di Uccio, Antonio Barone, Antonello Andreone, F. Fontana, G. P. Pepe, A., Andreone, A., Barone, A., DI CHIARA, F., Fontana, F., MILETTO GRANOZIO, G., Peluso, G., Pepe, U., SCOTTI DI UCCIO, Tafuri, Francesco, Andreone, Antonello, A., Dichiara, F. M., Granozio, Peluso, Giuseppe, SCOTTI DI UCCIO, Umberto, and Pepe, GIOVANNI PIERO

Subjects
chemistry.chemical_classification, Materials science, High-temperature superconductivity, Analytical chemistry, General Physics and Astronomy, Sputter deposition, law.invention, chemistry, Electrical resistivity and conductivity, law, X-ray crystallography, GROWTH, Thin film, Inorganic compound, Stoichiometry, Deposition (law)
Abstract

Superconductive thin films of Y-Ba-Cu-O have been grown in situ by r.f. magnetron sputtering from a single stoichiometric target on Al2O3 substrates. Zero-resistivity temperatures as high as 73 K have been achieved. X-ray and EDS analyses have been performed on the samples. The dependence of film features on deposition conditions is also discussed.

Published
1991
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4. YBa/sub 2/Cu/sub 3/O/sub 7-x/ grain boundary Josephson junctions with a MgO seed layer

Author

U.S. di Uccio, Fabio Miletto Granozio, F. Tafuri, F. Lombardi, M. Valentino, A. Di Chiara, A., di Chiara, F., Lombardi, F. M., Granozio, SCOTTI DI UCCIO, Umberto, Tafuri, Francesco, and M., Valentino

Subjects
Josephson effect, Superconductivity, Materials science, High-temperature superconductivity, Fabrication, Condensed matter physics, Yttrium barium copper oxide, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, law.invention, Magnetic field, chemistry.chemical_compound, chemistry, law, Grain boundary, Critical current, Electrical and Electronic Engineering
Abstract

A YBa/sub 2/Cu/sub 3/O/sub 7-x/ artificial grain boundary Josephson junction mas fabricated on to a [110] SrTiO/sub 3/ substrate employing a MgO seed layer. YBa/sub 2/Cu/sub 3/O/sub 7-x/ grows mainly oriented (103) on SrTiO/sub 3/ and [001] on the seed layer. An artificial 45/spl deg/ a or b axis tilt or twist boundary can occur according to the orientation of the MgO edge with respect to the [001] in plane direction of the substrate. Josephson junctions of good quality and excellent reproducibility were obtained in microbridges patterned across the grain boundary. Typical features of the phenomenology of high critical temperature superconductor (HTCS) Josephson junction were observed. The maximum value of the I/sub C/R/sub N/ product is of the order of 2-3 millivolts at T=4.2 K and of the order of 50 /spl mu/V at T=77 K respectively. The modulation of the critical current with the external applied magnetic field confirms the Josephson nature of the current in the weak link.

Published
1997

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