| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Grivel, Jean-Claude Roger
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2023Production of magnesium diboride wires
- 2021Millimeter-Wave Response of All Metal-Organic Deposited YBCO Transition Edge Bolometercitations
- 2019Electrical, magnetic and magnetotransport properties of Na and Mo doped Ca3Co4O9 materialscitations
- 2018Influence of iridium doping in MgB2 superconducting wirescitations
- 2018Two level undercut-profile substrate-based filamentary coated conductors produced using metal organic chemical vapor depositioncitations
- 2018New insights into the thermal behavior and decomposition of sodium propionatecitations
- 2018Deposition of highly oriented (K,Na)NbO3 films on flexible metal substratescitations
- 2017Thickness-Dependent Properties of YBCO Films Grown on GZO/CLO-Buffered NiW Substratescitations
- 2017Pulsed Laser Deposition of YBa2Cu3Ox with Scanning Beam: Target to Substrate Composition Transfer and Film Structurecitations
- 2016Preparation and characterization of Sc doped MgB2 wirescitations
- 2016Characterization of YBa2Cu3O7−δ Films With Various Porous Structures Grown by Metalorganic Decomposition Routecitations
- 2016All Metal Organic Deposited High-Tc Superconducting Transition Edge Bolometer on Yttria-Stabilized Zirconia Substratecitations
- 2016Superconducting Dy1-x(Gd,Yb)xBa2Cu3O7-δ thin films made by Chemical Solution Depositioncitations
- 2016Effect of Platinum Group Metal Doping in Magnesium Diboride Wirescitations
- 2015Influence of SrF2 on the Formation, Microstructure and Critical Temperature of (Bi,Pb)2Sr2Ca2Cu3O10 Polycrystalline Samplescitations
- 2014Comparative characterization of Cu–Ni substrates for coated conductorscitations
- 2014Manufacture of Bi-cuprate thin films on MgO single crystal substrates by chemical solution deposition
- 2014The crystal structure of paramagnetic copper(ii) oxalate (CuC2O4):citations
- 2013Microstructure, texture and magnetic properties of Ni-Cu-W substrates for coated conductorscitations
- 2013Yttrium-enriched YBa2Cu3Ox thin films for coated conductors fabricated by pulsed laser depositioncitations
- 2013Preparation and characterization of Bi2Sr2CaCu2O8+δ thin films on MgO single crystal substrates by chemical solution depositioncitations
- 2012Subsolidus phase relations of the SrO–WO3–CuO system at 800 °C in aircitations
- 2012Critical current density measurement of thin films by AC susceptibility based on the penetration parameter hcitations
- 2012Development of Strontium Titanate Thin films on Technical Substrates for Superconducting Coated Conductors
- 2012Cube-textured metal substrates for reel-to-reel processing of coated conductors
- 2010Influence of the initial Bi2223 phase content on microstructure development in Bi2223/Ag tapescitations
- 2010Anisotropy of the critical current in MgB2 tapes made of high energy milled precursor powdercitations
- 2002Preparation of (Bi, Pb)-2223/Ag tapes by high temperature sintering and post-annealing processcitations
Places of action
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article
Electrical, magnetic and magnetotransport properties of Na and Mo doped Ca3Co4O9 materials
Abstract
We report the electrical, magnetic and magnetotransport properties of Na and Mo dual doped Ca<sub>3-2x</sub>Na<sub>2x</sub>Co<sub>4-x</sub>Mo<sub>x</sub>O<sub>9</sub> (0 ≤ x ≤ 0.15) polycrystalline samples. The results indicate that the strength of ferrimagnetic interaction decreases with increase in doping, as is evident from the observed decrease in Curie temperatures (TC). The substitution of non-magnetic Mo<sup>6+</sup> ions (4d<sup>0</sup>) in CoO<sub>2</sub> layers and the presence of oxygen vacancies are responsible for decrease in ligand field strength, which results in an enhanced magnetization in the low doped x = 0.025 sample due to a change from the low spin to partial high spin electron configuration. The electrical resistivity of samples exhibits a semiconducting-like behavior in the low temperature range, a strongly correlated Fermi liquid-like behavior in the intermediate temperature range, and an incoherent metal-like behavior in the temperature range 210-300 K. All the samples show a large negative magnetoresistance (MR) at low temperature with a maximum MR value of -59% for the x = 0.025 sample at 2 K and 16 T applied field. The MR values follow the observed trend in magnetization at 5 K and sharply increase below the Curie temperatures of the samples, suggesting that the ferrimagnetic interactions are mainly responsible for the decrease in electrical resistivity under an applied magnetic field.