MoxCu1-xSr2YCu2 y (0.3≤ x ≤1) revisited: Superconductivity, magnetism and the molybdenum oxidation state
| hal.structure.identifier | Departamento de Quimica Inorganica I | |
| dc.contributor.author | MARIK, Sourav | |
| hal.structure.identifier | Departamento de Quimica Inorganica I | |
| dc.contributor.author | MORAN, Emilio | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LABRUGÈRE, Christine | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TOULEMONDE, Olivier | |
| hal.structure.identifier | Departamento de Quimica Inorganica I | |
| dc.contributor.author | ALARIO-FRANCO, Miguel Ángel | |
| dc.date.issued | 2012 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | A systematic study is reported on the range of stability of molybdenum substituted Sr-based 123 compounds with Mo-Sr-Y-Cu system, synthesized under ambient pressure. All materials crystallize in the space group: P4/mmm and the observed solubility limit of Mo is rather low in this structure because secondary phases start to form as soon as x>0.3 in nominal composition is reached. The antiferromagnetic property in all superconducting multiphase samples can be attributed to the secondary phase Y 2Cu 2O 5. The influence of oxygen annealing on the changes in electronic structure for the pure Mo 0.3Cu 0.7Sr 2YCu 2O y system associated with a non-superconductor to superconductor transition has been investigated by means of X-ray photoelectron spectroscopy, powder X-ray diffraction, magnetic susceptibility and specific-heat measurements. We unambiguously show the predominance of the Mo 5+ state over the Mo 6+ one on both as-synthesized and annealed phases; annealing under an oxygen atmosphere enhances both the Mo 6+ and Cu 2+ amounts. We suggest that the enhancement of Mo 6+ under oxygen annealing is in close relation with the decrease in the O 2p→Cu 3d charge-transfer energy resulting in superconducting properties. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject | Cuprates | |
| dc.subject | Magnetism | |
| dc.subject | Superconductivity | |
| dc.subject | XPS | |
| dc.title.en | MoxCu1-xSr2YCu2 y (0.3≤ x ≤1) revisited: Superconductivity, magnetism and the molybdenum oxidation state | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2012.02.015 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | 40-45 | |
| bordeaux.volume | 191 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00707520 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00707520v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Solid%20State%20Chemistry&rft.date=2012&rft.volume=191&rft.spage=40-45&rft.epage=40-45&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=MARIK,%20Sourav&MORAN,%20Emilio&LABRUG%C3%88RE,%20Christine&TOULEMONDE,%20Olivier&ALARIO-FRANCO,%20Miguel%20%C3%81ngel&rft.genre=article |
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