Julián Ortega, InmaculadaSáez Puche, ReginoRomero de Paz, JulioMartínez, José Luis2024-01-222024-01-221999Ortega, 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.0959-942810.1039/A805389Hhttps://hdl.handle.net/20.500.14352/94275The 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.engjournal articlehttps://doi.org/10.1039/A805389Hrestricted access546Química inorgánica (Química)MaterialesFísica del estado sólido2303.24 Tierras Raras2303.29 Elementos de Transición2211.17 Propiedades Magnéticas