RT Journal Article
T1 Anti-site disorder and physical properties in microwave synthesized RE2Ti2O7 (RE = Gd, Ho) pyrochlores
A1 Gómez-Pérez, Alejandro
A1 Prado Gonjal, Jesús De La Paz
A1 Muñoz Gil, Daniel
A1 Andrada Chacón, Adrián
A1 Sánchez Benítez, Francisco Javier
A1 Morán Miguélez, Emilio
A1 Azcondo, MaríaTeresa
A1 Amador, Ulises
A1 Schmidt, Rainer
AB In 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.
PB Royal Society of Chemistry
YR 2015
FD 2015
LK https://hdl.handle.net/20.500.14352/94361
UL https://hdl.handle.net/20.500.14352/94361
LA eng
NO Gómez-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.
NO Ministerio de Ciencia e Innovación (España)
NO Comunidad de Madrid
DS Docta Complutense
RD 1 sept 2024