Enhancement of the low field magnetoresistance by grain boundary modification in Sr2FeMoO6+δ

D. Niebieskikwiat; A. Caneiro; R. D. Sánchez; J. Fontcuberta

doi:10.1016/S0921-4526(02)00655-5

Enhancement of the low field magnetoresistance by grain boundary modification in Sr₂FeMoO_6+δ

D. Niebieskikwiat, A. Caneiro, R. D. Sánchez, J. Fontcuberta

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

15 Citas (Scopus)

Resumen

We study the magnetic and electric properties of polycrystalline Sr₂FeMoO_6+δ with controlled oxygen content, for nominal values δ = 0 and 0.04. While the magnetization and lattice parameters are the same in both samples, the resistivity and the magnetoresistance are greatly enhanced in the δ = 0.04 sample. This behavior is related to the formation of an impurity (insulating) phase at the grain boundaries, thus reinforcing the intergrain tunneling barrier.

Idioma original	Inglés
Páginas (desde-hasta)	107-110
Número de páginas	4
Publicación	Physica B: Condensed Matter
Volumen	320
N.º	1-4
DOI	https://doi.org/10.1016/S0921-4526(02)00655-5
Estado	Publicada - jul. 2002
Publicado de forma externa	Sí

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abstract = "We study the magnetic and electric properties of polycrystalline Sr2FeMoO6+δ with controlled oxygen content, for nominal values δ = 0 and 0.04. While the magnetization and lattice parameters are the same in both samples, the resistivity and the magnetoresistance are greatly enhanced in the δ = 0.04 sample. This behavior is related to the formation of an impurity (insulating) phase at the grain boundaries, thus reinforcing the intergrain tunneling barrier.",

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AU - Niebieskikwiat, D.

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AU - Sánchez, R. D.

AU - Fontcuberta, J.

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N2 - We study the magnetic and electric properties of polycrystalline Sr2FeMoO6+δ with controlled oxygen content, for nominal values δ = 0 and 0.04. While the magnetization and lattice parameters are the same in both samples, the resistivity and the magnetoresistance are greatly enhanced in the δ = 0.04 sample. This behavior is related to the formation of an impurity (insulating) phase at the grain boundaries, thus reinforcing the intergrain tunneling barrier.

AB - We study the magnetic and electric properties of polycrystalline Sr2FeMoO6+δ with controlled oxygen content, for nominal values δ = 0 and 0.04. While the magnetization and lattice parameters are the same in both samples, the resistivity and the magnetoresistance are greatly enhanced in the δ = 0.04 sample. This behavior is related to the formation of an impurity (insulating) phase at the grain boundaries, thus reinforcing the intergrain tunneling barrier.

KW - Double perovskites

KW - Grain boundaries

KW - Magnetoresistance

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