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Author Gil, D.M.; Guimpel, J.; Paesano Jr., A.; Carbonio, R.E.; Gómez, M.I.
Title Y[Fe1−xCox(CN)6]·4H2O (0 ⩽ x ⩽ 1) solid solutions: Synthesis, crystal structure, thermal decomposition and spectroscopic and magnetic properties Type Journal Article
Year 2012 Publication Journal of Molecular Structure Abbreviated Journal
Volume (down) 1015 Issue Pages 112-117
Keywords Y[Fe1−xCox(CN)6]·4H2O; Crystal structure refinement; Rietveld analysis; Infrared spectroscopy; Thermal decomposition
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ISSN 0022-2860 ISBN Medium
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Call Number BT @ jguimpel @ Serial 645
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Author Gil, D.M.; Navarro, M.C.; Lagarrigue, M.C.; Guimpel, J.; Carbonio, R.E.; Gómez, M.I.
Title Crystal structure refinement, spectroscopic study and magnetic properties of yttrium hexacyanoferrate (III) Type Journal Article
Year 2011 Publication Journal of Molecular Structure Abbreviated Journal
Volume (down) 1003 Issue 1-3 Pages 129-133
Keywords Hexacyanoferrate (III); Powder X-ray diffraction; Rietveld analysis; Infrared spectroscopy; Thermal analysis
Abstract Y[Fe(CN)6]·4H2O has been synthesized and characterized. The crystal structure was refined by Rietveld analysis using X-ray powder diffraction data. Y[Fe(CN)6]·4H2O crystallizes in the orthorhombic crystal system, space group Cmcm. Y3+ ion is eight-coordinated forming a bicapped distorted trigonal prism YN6O2. Fe3+ ion is six-coordinated in the form of an irregular octahedra FeC6 group and cyanide linkages between YN6O2 and FeC6 groups build an infinite polymeric array. The vibrational spectrum shows two bands corresponding to antisymmetric and symmetric stretching 12C14N in the CN stretching region. These bands are accompanied by four weak isotopic bands at lower frequency due to the presence of 13C and 15N in relative natural abundance. The HOH bending band split into three bands around 1600 cm−1 due to the presence of two kinds of water molecules in the structure. The thermal decomposition has been followed by thermogravimetric and differential thermal analysis, IR spectroscopy and powder XRD. The size and morphology of the complex and its thermal decomposition products were evaluated by scanning electron microscopy. The magnetic measurements confirm that Y[Fe(CN)6]·4H2O shows an antiferromagnetic order at low temperatures.
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ISSN 0022-2860 ISBN Medium
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Call Number BT @ jguimpel @ Serial 607
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Author Cecilia Blanco, M.; De Paoli, J.M.; Ceppi, S.; Tirao, G.; Nassif, V.M.; Guimpel, J.; Carbonio, R.E.
Title Synthesis, structural characterization and magnetic properties of the monoclinic ordered double perovskites BaLaMSbO6, with M = Mn, Co and Ni Type Journal Article
Year 2014 Publication Journal of Alloys and Compounds Abbreviated Journal
Volume (down) 606 Issue Pages 139-148
Keywords Double perovskites; Magnetic properties; X-ray emission spectroscopy; Neutron powder diffraction
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ISSN 0925-8388 ISBN Medium
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Call Number BT @ jguimpel @ Serial 681
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Author Haberkorn, N.; Condó, A.M.; Espinoza, C.; Jaureguizahar, S.; Guimpel, J.; Lovey, F.C.
Title Bulk-like behavior in the temperature driven martensitic transformation of Cu-Zn-Al thin films with 2H structure Type Journal Article
Year 2014 Publication Materials Letters Abbreviated Journal Journal of Alloys and Compounds
Volume (down) 591 Issue Pages 263-267
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Notes Cited By :3; Export Date: 14 March 2018 Approved no
Call Number BT @ jguimpel @ Serial 789
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Author Franco, D.G.; Sarmiento-Chavez, A.; Schenone, N.; Allcca, A.E.L.; Berisso, M.G.; Fasano, Y.; Guimpel, J.
Title Characterization of the Nb-B Superlattice System Type Journal Article
Year 2016 Publication Physica C: Superconductivity and its Applications Abbreviated Journal
Volume (down) 531 Issue Pages 93-97
Keywords Superlattice; Superconductivity; Transition Edge Sensors
Abstract Abstract

We study the growth, stacking and superconducting properties of Nb and B thin films and superlattices. The interest in these resides in their possible use in transition edge neutron sensors. The samples were grown by magnetron sputtering over Si (100) substrates. The X-ray diffraction patterns for all Nb containing samples show a Nb (110) preferential orientation. From the low-angle X-ray reflectivity we obtain information on the superlattice structure. The superconducting transition temperatures of the superlattices, obtained from the temperature dependence of the magnetization, are higher than those of single Nb films of similar thickness. The temperature dependence of the perpendicular and parallel upper critical fields indicate that the superlattices behave as an array of decoupled superconducting Nb layers.
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ISSN 0921-4534 ISBN Medium
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Call Number BT @ jguimpel @ Serial 743
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Author Amigó, M.L.; Crivillero, V.A.; Franco, D.G.; Badía-Majós, A.; Guimpel, J.; Nieva, G.
Title Vortex pinning by intrinsic correlated defects in Fe<inf>1-y</inf>Se Type Journal Article
Year 2014 Publication Journal of Physics: Conference Series Abbreviated Journal J. Phys.: Conf. Ser.
Volume (down) 507 Issue Part 1 Pages
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Notes Cited By :1; Export Date: 14 March 2018 Approved no
Call Number BT @ jguimpel @ Serial 790
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Author Lovey, F.C.; Condo, A.M.; Guimpel, J.; Yacaman, M.J.
Title Shape memory effect in thin films of a Cu-Al-Ni alloy Type Journal Article
Year 2008 Publication MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING Abbreviated Journal
Volume (down) 481 Issue Pages 426-430
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Abstract Thin films of Cu-26.9 at.% Al-5.5 at.% Ni were grown by dc magnetron sputtering from the alloy target previously melted in an induction furnace. The films were grown either on glass or (100)Si substrates at room temperature. The films, of approximately 3 μm thickness, were peeled off from the substrate for further studies. The structures and microstructures of the as grown films were analysed by transmission electron microscopy. A nanometric mixture of BCC and 2H phases was found irrespective of the substrate. The shape memory effect was not observed for this structural state. After an annealing at 1023 K for 3600s in He or Ar flux, followed by quenching to room temperature, the films were found to be in a martensitic state. Mainly the 18R structure was observed. At this stage the films were mechanically deformed at room temperature and then heated up to 373 K. A good shape recovery was observed to take place in a temperature range between 334 and 360 K. (C) 2007 Elsevier B.V. All rights reserved.
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ISSN 0921-5093 ISBN Medium
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Notes ISI:000255716100088 Approved no
Call Number BT @ hernan @ Serial 144
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Author Luccas, R.F.; Haberkorn, N.; Guimpel, J.; Bridoux, G.; Nieva, G.
Title Growth of GdBa2Cu3O7 thin films on single crystalline substrates of Y1-xPrBa2Cu3O7 Type Journal Article
Year 2007 Publication PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Abbreviated Journal
Volume (down) 460 Issue Pages 1377-1378
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Abstract Superconducting GdBa2CU3O7 thin films were grown by dc magnetron sputtering on Y1-xPrxBa2CU3O7 superconducting bulk single crystals. We optimized the in plane lattice matching with the Pr concentration. The samples were characterized by X-ray diffraction and electrical transport experiments. Magnetization hysteresis loops show high values of the critical currents for the films. (c) 2007 Elsevier B.V. All rights reserved.
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ISSN 0921-4534 ISBN Medium
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Notes ISI:000249870600314 Approved no
Call Number BT @ hernan @ Serial 150
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Author Bruynseraede, Y.; Osquiguil, E.; Maenhoudt, M.; Wuyts, B.; Nieva, G.; Guimpel, J.; Lederman, D.; Schuller, I.K.
Title Enhancement of Superconductivity by Photoexcitation Type Journal Article
Year 1994 Publication The Vortex State (NATO Science Series C: Mathematical and Physical Sciences) Abbreviated Journal The Vortex State
Volume (down) 438 Issue Pages 303-312
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Publisher Kluwer Academic Place of Publication Editor Bontemps, N.; Bruynseraede, Yvan; Deutscher, Guy; Kapitulnik, Aharon
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ISSN ISBN 0792329716 Medium
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Call Number BT @ gnieva @ Serial 457
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Author Chialvo, C.E.; Guimpel, J.; Pastoriza, H.
Title Hall Effect in Superconductors with Periodic Pinning Arrays Type Journal Article
Year 2005 Publication Physica C Abbreviated Journal
Volume (down) 422 Issue 3-4 Pages 112-116
Keywords
Abstract We have studied the electrical resistivity and Hall effect in the dissipative regime of Nb films with periodic rectangular arrays of Ni and Co submicrometric dots. Samples with different orientations of the pinning arrays respect to the applied current direction where studied. The even parity in magnetic field of the Hall effect signals a guided motion of the vortices. Possible origins for the vortex channeling are discussed.
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Call Number BT @ hernan @ chialvo05 Serial 7
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