RT Journal Article
T1 Structural characterisation and spin glass behaviour of the new oxide Ba2ScCoO5
A1 Julián Ortega, Inmaculada
A1 Sáez Puche, Regino
A1 Romero de Paz, Julio
A1 Martínez, José Luis
AB 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.
PB Royal Society of Chemistry
SN 0959-9428
YR 1999
FD 1999
LK https://hdl.handle.net/20.500.14352/94275
UL https://hdl.handle.net/20.500.14352/94275
LA eng
NO 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.
NO Comisión Interministerial de Ciencia y Tecnología (España)
DS Docta Complutense
RD 6 abr 2025