Anti-site disorder and physical properties in microwave synthesized RE2Ti2O7 (RE = Gd, Ho) pyrochlores

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dc.contributor.authorGómez-Pérez, Alejandro
dc.contributor.authorPrado Gonjal, Jesús De La Paz
dc.contributor.authorMuñoz Gil, Daniel
dc.contributor.authorAndrada Chacón, Adrián
dc.contributor.authorSánchez Benítez, Francisco Javier
dc.contributor.authorMorán Miguélez, Emilio
dc.contributor.authorAzcondo, MaríaTeresa
dc.contributor.authorAmador, Ulises
dc.contributor.authorSchmidt, Rainer
dc.date.accessioned2024-01-22T12:15:43Z
dc.date.available2024-01-22T12:15:43Z
dc.date.issued2015
dc.description.abstractIn this work we report on the microwave assisted synthesis of nano-sized Gd2Ti2O7 (GTO) and Ho2Ti2O7 (HTO) powders from the RE2Ti2O7 pyrochlore family (RE ¼ rare earth). Synchrotron X-ray powder diffraction was used to study RE–Ti cationic anti-site defects with concentrations that decrease in both samples with increasing temperature starting from 1100 C, and the defects disappear at 1400 ºC. SQUID magnetometry measurements revealed that GTO shows a predominantly anti-ferromagnetic structure, whereas HTO exhibits magnetic saturation and a ferromagnetic component at low temperature. Impedance spectroscopy data revealed strongly increased ionic oxygen vacancy conduction in HTO ceramic pellets as compared to GTO, which may be associated with a higher degree of oxygen vacancy disorder. This argument was supported by Raman spectroscopy data.
dc.description.departmentDepto. de Química Inorgánica
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (España)
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.identifier.citationGómez-Pérez, Alejandro, et al. «Anti-Site Disorder and Physical Properties in Microwave Synthesized RE 2 Ti 2 O 7 (RE = Gd, Ho) Pyrochlores». RSC Advances, vol. 5, n.o 104, 2015, pp. 85229-41. https://doi.org/10.1039/C5RA07796F.
dc.identifier.doi10.1039/c5ra07796f
dc.identifier.essn2046-2069
dc.identifier.officialurlhttps://doi.org/10.1039/C5RA07796F
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94361
dc.issue.number104
dc.journal.titleRSC Advances
dc.language.isoeng
dc.page.final85241
dc.page.initial85229
dc.publisherRoyal Society of Chemistry
dc.relation.projectIDMAT2013- 64452-C4-1-R
dc.relation.projectIDS2013MIT-2753
dc.rights.accessRightsmetadata only access
dc.subject.cdu546
dc.subject.ucmQuímica inorgánica (Química)
dc.subject.unesco23 Química
dc.titleAnti-site disorder and physical properties in microwave synthesized RE2Ti2O7 (RE = Gd, Ho) pyrochlores
dc.typejournal article
dc.volume.number5
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery7a2b8d3d-7159-48e6-a318-76923a9867ed
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