Insulator-superconductor transition in Tm0.4Pr0.6Ba2Cu3O7 by iso-valent substitution at Ba site
Identifieur interne : 001329 ( Pascal/Checkpoint ); précédent : 001328; suivant : 001330Insulator-superconductor transition in Tm0.4Pr0.6Ba2Cu3O7 by iso-valent substitution at Ba site
Auteurs : L. Colonescu [France] ; J. Berthon [France] ; R. Suryanarayanan [France]Source :
- Solid state communications [ 0038-1098 ] ; 1997.
Descripteurs français
- Pascal (Inist)
- Transition supraconductrice, Hybridation, Supraconductivité, Composition chimique, Transformation phase cristalline, Réseau orthorhombique, Réseau quadratique, Recuit, Atmosphère contrôlée, Orbitale, Diffraction RX, Transition métal isolant, Paramètre cristallin, Polycristal, Thulium oxyde, Praséodyme oxyde, Baryum oxyde, Strontium oxyde, Etude expérimentale, 7462B, 7425J, 7472Y, Cuivre oxyde, Composé n éléments, Tm0,4Pr0,6Ba2-kSrkcu3o6+z, Ba Cu O Pr Sr Tm.
English descriptors
- KwdEn :
- Annealing, Barium oxides, Chemical composition, Controlled atmospheres, Copper oxides, Crystal-phase transformations, Experimental study, Hybridization, Lattice parameters, Metal-insulator transition, Multi-element compounds, Orbital, Orthorhombic lattices, Polycrystals, Praseodymium oxides, Strontium oxides, Superconducting transition, Superconductivity, Tetragonal lattices, Thulium oxides, XRD.
Abstract
We report on the preparation, X-ray diffraction and a.c. susceptibility of Tm0.4Pr0.6Ba2.kSrkCu3O6+z. An orthorhombic to tetragonal transition was observed for k = 0.8. When the samples (for 0 ≤ k < 1) were heated in argon prior to oxygen annealing, orthorhombicity was found to increase. An insulator to superconductor transition was observed for k ≥ 0.6. The effect of Sr substitution and the heat treatment may lead to a reduction in Pr-f hybridization with oxygen orbitals and to an increase in oxygen ordering favouring the restoration of superconductivity in this compound.
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Pascal:98-0023034Le document en format XML
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Pr<sub>0.6</sub>
Ba<sub>2</sub>
Cu<sub>3</sub>
O<sub>7</sub>
by iso-valent substitution at Ba site</title>
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Pr<sub>0.6</sub>
Ba<sub>2</sub>
Cu<sub>3</sub>
O<sub>7</sub>
by iso-valent substitution at Ba site</title>
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<series><title level="j" type="main">Solid state communications</title>
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<term>Copper oxides</term>
<term>Crystal-phase transformations</term>
<term>Experimental study</term>
<term>Hybridization</term>
<term>Lattice parameters</term>
<term>Metal-insulator transition</term>
<term>Multi-element compounds</term>
<term>Orbital</term>
<term>Orthorhombic lattices</term>
<term>Polycrystals</term>
<term>Praseodymium oxides</term>
<term>Strontium oxides</term>
<term>Superconducting transition</term>
<term>Superconductivity</term>
<term>Tetragonal lattices</term>
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<term>Transformation phase cristalline</term>
<term>Réseau orthorhombique</term>
<term>Réseau quadratique</term>
<term>Recuit</term>
<term>Atmosphère contrôlée</term>
<term>Orbitale</term>
<term>Diffraction RX</term>
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<term>Strontium oxyde</term>
<term>Etude expérimentale</term>
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<term>7425J</term>
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<front><div type="abstract" xml:lang="en">We report on the preparation, X-ray diffraction and a.c. susceptibility of Tm<sub>0.4</sub>
Pr<sub>0.6</sub>
Ba<sub>2.k</sub>
Sr<sub>k</sub>
Cu<sub>3</sub>
O<sub>6+z</sub>
. An orthorhombic to tetragonal transition was observed for k = 0.8. When the samples (for 0 ≤ k < 1) were heated in argon prior to oxygen annealing, orthorhombicity was found to increase. An insulator to superconductor transition was observed for k ≥ 0.6. The effect of Sr substitution and the heat treatment may lead to a reduction in Pr-f hybridization with oxygen orbitals and to an increase in oxygen ordering favouring the restoration of superconductivity in this compound.</div>
</front>
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Pr<sub>0.6</sub>
Ba<sub>2</sub>
Cu<sub>3</sub>
O<sub>7</sub>
by iso-valent substitution at Ba site</s1>
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<fC01 i1="01" l="ENG"><s0>We report on the preparation, X-ray diffraction and a.c. susceptibility of Tm<sub>0.4</sub>
Pr<sub>0.6</sub>
Ba<sub>2.k</sub>
Sr<sub>k</sub>
Cu<sub>3</sub>
O<sub>6+z</sub>
. An orthorhombic to tetragonal transition was observed for k = 0.8. When the samples (for 0 ≤ k < 1) were heated in argon prior to oxygen annealing, orthorhombicity was found to increase. An insulator to superconductor transition was observed for k ≥ 0.6. The effect of Sr substitution and the heat treatment may lead to a reduction in Pr-f hybridization with oxygen orbitals and to an increase in oxygen ordering favouring the restoration of superconductivity in this compound.</s0>
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<tree><country name="France"><region name="Île-de-France"><name sortKey="Colonescu, L" sort="Colonescu, L" uniqKey="Colonescu L" first="L." last="Colonescu">L. Colonescu</name>
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<name sortKey="Berthon, J" sort="Berthon, J" uniqKey="Berthon J" first="J." last="Berthon">J. Berthon</name>
<name sortKey="Suryanarayanan, R" sort="Suryanarayanan, R" uniqKey="Suryanarayanan R" first="R." last="Suryanarayanan">R. Suryanarayanan</name>
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