RT Journal Article
T1 Multiple phase and dielectric transitions on a novel multi-sensitive [TPrA][M(dca)3] (M: Fe2+, Co2+ and Ni2+) hybrid inorganic–organic perovskite family
A1 Bermúdez García, Juan Manuel
A1 Sánchez Andújar, Manuel
A1 Yáñez Vilar, Susana
A1 Castro García, Socorro
A1 Artiaga, Ramón
A1 López Beceiro, Jorge
A1 Botana López, Luis Miguel
A1 Alegría, Ángel
A1 Señarís Rodríguez, María Antonia
AB The hybrid inorganic–organic [TPrA][M(dca)3] (M: Fe2+, Co2+ and Ni2+) compounds, where TPrA is the tetrapropylammonium cation and dca is the dicyanamide anion, are unique multi-sensitive compounds that display multiple phases and dielectric transitions. These materials exhibit up to three first-order structural transitions (between the polymorphs I, Ia, Ib and II) associated with the same number of dielectric transitions in the temperature range of 210–360 K. The mechanisms responsible for these dielectric responses are found to be novel within the hybrid perovskites, involving ionic displacements of the A-site cations (TPrA) and order/disorder processes of the X anions (dca). In addition, the phase transitions and dielectric transition temperatures can be tuned by applying external hydrostatic pressure or by inducing internal pressure by modifying the tolerance factor through ionic substitution in the B-sites. This multi-sensitive response towards temperature, external and internal pressure opens up promising technological applications for this family of materials, such as dielectric transductors or multistimuli-sensors, whose response can be modulated in a wide range of temperatures and pressures
PB Royal Society of Chemistry
YR 2016
FD 2016
LK http://hdl.handle.net/10347/24333
UL http://hdl.handle.net/10347/24333
LA eng
NO J. Mater. Chem. C, 2016,4, 4889-4898
NO The authors are grateful for the financial support from Ministerio de Economía y Competitividad MINECO (MINECO) ENE2014-56237-C4-4-R and Xunta de Galicia under the project GRC2014/042. J. M. B.-G. also wants to thank Barrié Foundation for a predoctoral fellowship and S. Y.-V. to the Xunta de Galicia for a postdoctoral grant (Plan I2C)
DS Minerva
RD 25 abr 2026