Sr 2 Fe 1+: X Re 1- x O 6 double perovskites: Magnetoresistance and (magneto)thermopower

MAIGNAN, ANTOINE; MARTIN, CHRISTINE; LEBEDEV, OLEG; SOTTMANN, JONAS; NATAF, LUCIE; BAUDELET, FRANÇOIS; HÉBERT, SYLVIE; CARBONIO, RAÚL E.

CHEMICAL COMMUNICATIONS

ROYAL SOC CHEMISTRY

Año: 2019 vol. 55 p. 5878 - 5878

1359-7345

olycrystalline Sr 2 Fe 1+x Re 1-x O 6 samples have been synthesized and structurally characterized by X-ray powder diffraction, transmission electron microscopy and X-ray absorption spectroscopy. Resistivity strongly increases with x, but a large and negative magnetoresistance persists up to x = 0.33. This is discussed considering the charge delocalization in iron and rhenium t 2g orbitals.