The dependence of the ac-magnetic susceptibility of La0.85Sr0.15CoO3 on the annealing temperature used during synthesis is addressed. Such dependence has been previously attributed to compositional inhomogeneities. Nevertheless, the presence of distinct phases with different chemical compositions is excluded after explorations by several techniques. Instead it is proposed that an electronic phase separation takes place in the material, whose state is changed after charge-carrier redistributions due to the thermal history of the samples, analogously to parent manganese-based perovskites.
Phase separation as origin of the magnetic anomalies in La0.85Sr0.15CoO3 / J., Mira; J., Rivas; G., Baio; Barucca, Gianni; Caciuffo, ROBERTO GIOVANNI MARIA; Rinaldi, Daniele; D., Fiorani; M. A., SEÑARÌS RODRÌGUEZ. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 89:10(2001), pp. 5606-5609. [10.1063/1.1365060]
Phase separation as origin of the magnetic anomalies in La0.85Sr0.15CoO3
BARUCCA, Gianni;CACIUFFO, ROBERTO GIOVANNI MARIA;RINALDI, DANIELE;
2001-01-01
Abstract
The dependence of the ac-magnetic susceptibility of La0.85Sr0.15CoO3 on the annealing temperature used during synthesis is addressed. Such dependence has been previously attributed to compositional inhomogeneities. Nevertheless, the presence of distinct phases with different chemical compositions is excluded after explorations by several techniques. Instead it is proposed that an electronic phase separation takes place in the material, whose state is changed after charge-carrier redistributions due to the thermal history of the samples, analogously to parent manganese-based perovskites.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
