Understanding the Relationships between Structural Features and Optical/Magnetic Properties When Designing Fe1-xMgxMoO4 as Piezochromic Compounds.
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | BLANCO-GUTIERREZ, Veronica | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | DEMOURGUES, Alain | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | TOULEMONDE, Olivier | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | WATTIAUX, Alain | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | NGUYEN, Olivier | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | GAUDON, Manuel | |
dc.date.issued | 2015 | |
dc.identifier.issn | 0020-1669 | |
dc.description.abstractEn | Fe1-xMgxMoO4 compounds with x = 0, 0.25, 0.5, 0.75, and 1.0 were obtained after annealing under inert gas at T = 700 °C. All of the compounds exhibit a pressure-induced and/or temperature-induced phase transition between the two polymorphs adopted by AMoO4 compounds (A = Mn, Fe, Co, and Ni). For the FeMoO4 compound, for both the α and the β allotropic forms, the structural features have been correlated to the magnetic properties, the Mössbauer signals, and the optical absorption properties to gain a better understanding of the phenomena at the origin of the piezo(thermo)chromic behavior. The different contributions of the Mössbauer signals were attributed to the different Fe(2+) ions or Fe(3+) ions from the structural data (Wyckoff positions, bond distances and angles) and were quantified. Furthermore, the low Fe(3+) concentration (9 and 4 mol %, respectively, in the α and the β allotropic forms) was also quantified based on the magnetic susceptibility measurements. The net increase in the Fe(3+) quantity in the α-form in comparison to the β-form, which is associated with the occurrence of Fe-Mo charge transfer, is at the origin of the important divergence of coloration of the two forms. To design new piezo(thermo)chromic oxides and to control the pressure (temperature) of this first-order phase transition, FeMoO4-MgMoO4 solid solutions were synthesized. The optical contrast between the two allotropic forms was increased due to magnesium incorporation, and the phase transition (β → α) pressure increased steadily with the Mg content. A new generation of nontoxic and chemically stable piezochromic compounds that are sensible to various pressures was proposed. | |
dc.description.sponsorship | Revêtements Piézochromes Réversibles pour la Détection d'Impacts sur Supports Composites - ANR-13-RMNP-0011 | |
dc.language.iso | en | |
dc.publisher | American Chemical Society | |
dc.title.en | Understanding the Relationships between Structural Features and Optical/Magnetic Properties When Designing Fe1-xMgxMoO4 as Piezochromic Compounds. | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1021/ic5025845 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Inorganic Chemistry | |
bordeaux.page | 2176-2184 | |
bordeaux.volume | 54 | |
bordeaux.issue | 5 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-01132854 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-01132854v1 | |
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