Oxygen-induced grain boundary effects on magnetotransport properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">FeMoO</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

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

doi:10.1103/physrevb.64.180406

Cited by 104 publications

(94 citation statements)

References 21 publications

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“…While the results may at first suggest that the enhanced LFMR results from SrMoO 4 at the grain boundaries, [15] the TEM studies we have performed on differently oxygenated samples has never shown regions of very thin (10 nm or less) tunnel-barrier layers covering all the grains. Only in the highly oxygenated sample C1 was the layer clearly observed around a number of the boundaries.…”

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confidence: 67%

Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

et al. 2006

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Oxygen cycling of Sr2Fe2–xMoxO6–δ (SFMO) samples allows the resistivity and low‐field magnetoresistance (LFMR) to be precisely cycled. TEM shows that the change in resistivity with oxygen is not only a consequence of the change in oxygen stoichiometry of SFMO, but also a concomitant change in the Fe/Mo ratio in SFMO. The figure shows the change in MR and resistivity (values in mΩ cm above the data points for samples D1–D7) with increasing post‐annealing time.

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confidence: 67%

Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

et al. 2006

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“…For the A 2 FeMoO 6-w system, it has been reported that the grain size, 18,19 the degree of oxygen non-stoichiometry, 20 and the degree of Fe/Mo order at the B-cation site 21,22 strongly affect the magnetotransport characteristics. Thus in order to investigate "intrinsic characteristics" of the Mössbauer spectra measured for the samples at 77 K were analyzed using four spectral components.…”

Section: Resultsmentioning

confidence: 99%

Iron valence in double-perovskite (Ba,Sr,Ca)2FeMoO6: isovalent substitution effect

Yasukawa

Lindén

Chan

et al. 2004

Journal of Solid State Chemistry

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“…7 a plot where we compare the resistivity of SFMO samples treated as-prepared and after annealing in a flow of commercial Ar (99.99%). It is clear that the resistivity of the samples changes dramatically although the bulk magnetic properties do not change [15]. This illustrates the role of intergrains on the transport properties and its instability.…”

Section: Magnetoresistive Propertiesmentioning

confidence: 86%

Cerámicas magnetorresistivas. Progresos recientes: desde el entendimiento básico a las aplicaciones

Fontcuberta¹,

Balcells²,

Navarro³

et al. 2004

Bol. Soc. Esp. Ceram. Vidr.

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Magnetoresistive ceramics, based on half-metallic ferromagnetic oxides have received renewed attention in the last few years because of their possible applications. Here, we review some recent progress on the development of magnetoresistive ceramic materials such as La 2/3 Sr 1/ 3 MnO 3 and Sr 2 FeMoO 6 ceramic materials. We shall revisit their basic properties, the strategies that have been employed to understand and to improve their intrinsic properties, pushing the limits of their operation at temperatures well above room-temperature, and the development of some applications. This effort has required the contribution of a number of actors. Starting from research laboratories, it has progressively involved industries that nowadays are able to supply high quality raw-materials or to manufacture magnetoresistive components at large scale. Keywords: magnetoresistive ceramics, manganese oxides, magnetic sensorsCerámicas magnetorresistivas. Progresos recientes: desde el entendimiento básico a las aplicaciones.Las cerámicas magnetorresistivas, basadas en óxidos semi-metálicos ferromagnéticos han recibido una renovada atención en los últimos años debido a sus posibles aplicaciones. Se revisan aquí algunos de los recientes progresos en el desarrollo de materiales cerámicos magnetorresistivos como La 2/3 Sr 1/3 MnO 3 y Sr 2 FeMoO 6 . Se revisitan sus propiedades básicas, las estrategias empleadas para entender y mejorar sus propiedades intrínsecas, llevando sus límites de operación a temperaturas muy por encima de temperatura ambiente, y el desarrollo de algunas aplicaciones. Este esfuerzo ha requerido al contribución de un gran número de actores. Comenzando por laboratorios de investigación, se ha implicado progresivamente a industrias que hoy en día están capacitadas para suministrar materias primas de alta calidad o para fabricar componentes magnetorresistivos a gran escala. Palabras clave: cerámicas magneto-resistivas, óxidos de manganeso, sensores magnéticos

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Oxygen-induced grain boundary effects on magnetotransport properties ofSr2FeMoO6+δ

Cited by 104 publications

References 21 publications

Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

Iron valence in double-perovskite (Ba,Sr,Ca)2FeMoO6: isovalent substitution effect

Cerámicas magnetorresistivas. Progresos recientes: desde el entendimiento básico a las aplicaciones

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Oxygen-induced grain boundary effects on magnetotransport properties ofSr2FeMoO6+δ

Cited by 104 publications

References 21 publications

Reversible Low‐Field Magnetoresistance in Sr2Fe2–xMoxO6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

Reversible Low‐Field Magnetoresistance in Sr2Fe2–xMoxO6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

Iron valence in double-perovskite (Ba,Sr,Ca)2FeMoO6: isovalent substitution effect

Cerámicas magnetorresistivas. Progresos recientes: desde el entendimiento básico a las aplicaciones

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Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions

Reversible Low‐Field Magnetoresistance in Sr₂Fe_2–_xMo_xO_6–δ by Oxygen Cycling and the Role of Excess Mo (x > 1) in Grain‐Boundary Regions