2026-06-01T02:08:51Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/942752025-03-18T15:42:44Zcom_20.500.14352_14col_20.500.14352_15

Structural characterisation and spin glass behaviour of the new oxide Ba2ScCoO5 Julián Ortega, Inmaculada Sáez Puche, Regino Romero de Paz, Julio Martínez, José Luis 546 Química inorgánica (Química) Materiales Física del estado sólido 2303.24 Tierras Raras 2303.29 Elementos de Transición 2211.17 Propiedades Magnéticas The new oxide Ba 2 ScCoO 5 has been synthesised by solid state reaction and characterised by using both X-ray and electron diffraction techniques. It crystallises in a perovskite-type structure, showing cubic symmetry, space group Pm[3 with combining macron]m [a=4.1400(9) Å]. χ dc and χ ac magnetic susceptibility have been measured down to 1.6 K and analysed, indicating the existence of a freezing phenomenon corresponding to a spin glass state. In the high temperature range, χ dc shows a Curie-Weiss like behaviour, with magnetic correlations starting around T C =50 K. Below this temperature, a strong irreversibility in χ vs. T curves obtained by zero field cooled and field cooled processes (ZFC/FC) has been detected. A second magnetic transition to a spin-glass phase is observed at T F =35 K in the ZFC curve. χ ac measurements performed at different frequencies and magnetic fields also show all the common features characteristic of re-entrant spin-glasses. A possible origin of this magnetic behaviour is proposed and discussed. Comisión Interministerial de Ciencia y Tecnología (España) Depto. de Química Inorgánica Fac. de Ciencias Químicas TRUE pub 2024-01-22T10:05:35Z 2024-01-22T10:05:35Z 1999 journal article VoR https://hdl.handle.net/20.500.14352/94275 0959-9428 10.1039/A805389H eng MAT97-0697-C02-01 Ortega, Inmaculada Julián, et al. «Structural characterisation and spin glass behaviour of the new oxide Ba2ScCoO5». Journal of Materials Chemistry, vol. 9, n.o 2, 1999, pp. 525-28. DOI.org (Crossref), https://doi.org/10.1039/a805389h. restricted access application/pdf Royal Society of Chemistry