RT Journal Article
T1 Enhancing the Néel temperature in 3d/5d R2NiIrO6 (R= La, Pr and Nd) double perovskites by reducing the R3+ ionic radii
A1 Kayser González, Paula
A1 Munoz, Angel
A1 Martinez, Jose Luis
A1 Fath, Francois
A1 Fernandez-Diaz, Maria Teresa
A1 Alonso, Jose Antonio
AB Double perovskites containing Ir4+ were synthesised by a citrate technique, followed by an annealing treatment in air at 1100 °C. The crystal structure of the three compounds, with formula R2NiIrO6 (R= La, Pr and Nd), were determined using a combined refinement against neutron powder diffraction (NPD) and synchrotron x-ray powder diffraction (SXRPD) data sets. At room temperature, all the samples were indexed in the space group P21/n and the monoclinic symmetry remains in the 300 to 1273 K temperature range. Magnetization measurements suggest competitive antiferromagnetic and ferromagnetic interactions, with an unexpected increment of the ordering temperature (TN) along the series. The magnetic structures of all the samples were defined with the propagation vector k = 0; the Ni2+ and Ir4+ moment arrangement, different for each compound, shows a strong dependence on the nature of the rare-earth ion.
PB Elsevier
SN 1359-6454
YR 2021
FD 2021
LK https://hdl.handle.net/20.500.14352/92238
UL https://hdl.handle.net/20.500.14352/92238
LA eng
NO Kayser, P.; Muñoz, A.; Martínez, J. L.; Fauth, F.; Fernández-Díaz, M. T.; Alonso, J. A. Enhancing the Néel temperature in 3d/5d R2NiIrO6 (R=La, Pr and Nd) double perovskites by reducing the R3+ ionic radii. Acta Materialia 2021, 207, 116684 DOI:10.1016/j.actamat.2021.116684.
NO Ministerio de Economía y Competitividad (España)
DS Docta Complutense
RD 21 abr 2025