RT Journal Article
T1 Structural, Microstructural, and Magnetic Properties of Ce and Sr-coSubstituted (La2−xVacx)NiTiO6 (x = 0, 0.1) Perovskites
A1 Azcondo, M. Teresa
A1 Yuste, Mercedes
A1 Gómez Pérez, Alejandro
A1 Ritter, Clemens
A1 Muñoz Noval, Álvaro
A1 Romero de Paz, Julio
A1 Boulahya, Khalid
A1 García Alvarado, Flaviano
A1 Amador, Ulises
AB The synthesis of materials in the La2–x(CeSr)mSrn□pNiTiO6-δ series (where □ denotes vacancies, with m, n, and p ranging from 0 to 0.2, and x = 2m + n + p taking values of 0.4 and 0.6) was attempted using a modified Pechini method. A comprehensive chemical, structural, and microstructural characterization was carried out using X-ray diffraction (conventional and synchrotron), neutron powder diffraction, selected area electron diffraction, high-resolution transmission electron microscopy, and X-ray absorption spectroscopy. The results highlight that single-phase samples are obtained for compositions with low cerium and low vacancy contents (m ≤ 0.1 and p ≤ 0.1). The structural study reveals that the compounds present monoclinic symmetry, space groups P21/n or P21, with Ni and Ti cations exhibiting different degrees of disorder or short-range order, influenced by the existence of A-site vacancies and the contents of Ce4+ and Sr2+ ions. The magnetic behavior is closely related to the cationic disorder at the B-site. The presence of antisite defects and short-range Ni–O–Ni interactions contribute to a lack of three-dimensional antiferromagnetic ordering, probably forming instead of random Ni2+ antiferromagnetic clusters at low temperatures.
PB ACS
YR 2025
FD 2025-11-18
LK https://hdl.handle.net/20.500.14352/128581
UL https://hdl.handle.net/20.500.14352/128581
LA eng
NO Ministerio de Ciencia e Inovación (España)
NO Unión Europea
NO Comunidad de Madrid
DS Docta Complutense
RD 21 ene 2026