Show simple item record

Oxidation induced superconductivity and Mo/Cu charge equilibrium in Mo0.3Cu0.7Sr2ErCu2Oy

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierDepartamento de Quimica Inorganica I
dc.contributor.authorMARIK, Sourav
hal.structure.identifierDepartamento de Quimica Inorganica I
hal.structure.identifierDepartamento de Química Industrial y Polímeros
dc.contributor.authorDOS SANTOS-GARCIA, Antonio Juan
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLABRUGÈRE, Christine
hal.structure.identifierDepartamento de Quimica Inorganica I
dc.contributor.authorMORÁN, Emilio
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTOULEMONDE, Olivier
hal.structure.identifierDepartamento de Quimica Inorganica I
dc.contributor.authorALARIO-FRANCO, Miguel Ángel
dc.date.issued2015
dc.identifier.issn0953-2048
dc.description.abstractEnA detailed study of the structure-composition-properties correlation is reported for the as-prepared (AP) and two oxygenated (oxygenation carried out at ambient pressure and under high pressure) Mo0.3Cu0.7Sr2ErCu2Oy samples. Their crystal structures were characterized by combining the x-ray/neutron powder diffraction (NPD) and electron diffraction techniques. All the samples show tetragonal symmetry, crystallizing in the P4/mmm space group. The influence of oxygenation in the electronic states for the Mo0.3Cu0.7Sr2ErCu2Oy system associated with an oxidation reaction leading from a non-superconducting to a superconducting state has also been investigated by means of x-ray photoelectron spectroscopy (XPS). XPS measurements show the predominance of the MoV oxidation state over the MoVI one in the AP sample; annealing under flowing oxygen enhances both the MoVI and CuII amounts. The AP sample shows the existence of ferromagnetic clusters originated from the short-range magnetic correlations of the paramagnetic MoV cations. On the other hand, all the oxygenated samples are not magnetic but superconducting. The high-pressure oxygenated sample shows the highest superconducting transition temperature of TC = 84 K. A partial oxygen ordering in the (Mo/Cu)O1+δ chain and a decrease in the charge transfer energy after oxygenation induces superconductivity in the oxygenated samples.
dc.language.isoen
dc.publisherIOP Publishing
dc.title.enOxidation induced superconductivity and Mo/Cu charge equilibrium in Mo0.3Cu0.7Sr2ErCu2Oy
dc.typeArticle de revue
dc.identifier.doi10.1088/0953-2048/28/4/045007
dc.subject.halChimie/Matériaux
bordeaux.journalSuperconductor Science and Technology
bordeaux.page045007 (10 p.)
bordeaux.volume28
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01138858
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01138858v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Superconductor%20Science%20and%20Technology&rft.date=2015&rft.volume=28&rft.issue=4&rft.spage=045007%20(10%20p.)&rft.epage=045007%20(10%20p.)&rft.eissn=0953-2048&rft.issn=0953-2048&rft.au=MARIK,%20Sourav&DOS%20SANTOS-GARCIA,%20Antonio%20Juan&LABRUG%C3%88RE,%20Christine&MOR%C3%81N,%20Emilio&TOULEMONDE,%20Olivier&rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record