Antisites and electron-doping effects on the magnetic transition 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:mrow></mml:msub></mml:mrow></mml:math>double perovskite

Navarro, J.; Nogués, J.; Muñoz, J.S.; Fontcuberta, J.

doi:10.1103/physrevb.67.174416

Cited by 142 publications

(103 citation statements)

References 17 publications

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“…For the compounds with Fe/Mo ratio of 1.5 the intensities of low frequency peaks are smaller than those for Fe/Mo ratio equal to one, which has been attributed to a decreased number of Mo defect sites. However, the Fe excess leads to a considerable amount of Fe antisite ions which couple antiferromagnetically with their neighbours and cause a decrease in bulk magnetization of the compound [7,10]. The centre of gravity (weighted centre) of the main line and the low frequency satellite shifts towards higher frequencies with La and "hole" doping (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Neutron diffraction, X-ray magnetic circular dichroism (XMCD) and nuclear magnetic resonance (NMR) measurements have proven the existence of a non-integer magnetic moment at Mo and Fe sites ( [2,3] and [4]). La substitution was found to increase the Curie temperature and also the number of defects ( [5,6] and [7]). It also increases the Mo hyperfine field value [8].…”

Section: Introductionmentioning

confidence: 99%

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NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites

et al. 2004

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The 95 Mo and 97 Mo NMR spin-echo study of (Sr,Ba,La) 2 Fe 1+y Mo 1−y O 6 double perovskites is reported. Powder samples of Ba 1.44 Sr 0.36 La 0.2 FeMoO 6 and (Ba0.8Sr0.2)2−2xLax#xFe1+yMo1−yO6, where # denotes vacancies, for: x = 0, y = 0; x = 0.1, x = 0.2 and x = 0.3, y = 0 and y = 0.2 were measured at 4.2 K and no applied magnetic field. NMR signals are observed at 55-100 MHz for the main line and 30-55 MHz for low-frequency satellite. The main line and the satellite are attributed to the ideal and defect positions of Mo atoms. La and vacancy doping introduce more defects, however, increasing the Fe/Mo ratio decreases the amount of defect Mo sites. La doping causes a satellite pattern at the high frequency side of the spectrum, which is related to different numbers of the La next neighbours. The effect is attributed to an increase in the electron density and the corresponding magnetic moment at the adjacent Mo sites and reveals a local character of the electron doping.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites

et al. 2004

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“…Among the interesting concepts an electron-doping scheme of replacing Sr with a trivalent rare-earth element has been employed [9]. An increase in the ferrimagnetic ordering temperature (T C ) has been observed [9,10], despite the decrease in saturation magnetization. In the present work, 57 Fe Mössbauer spectroscopy has been applied to study the influence of electron doping, accomplished by partial replacement of Sr by Nd, on the valence states of Fe and Mo.…”

Section: Introductionmentioning

confidence: 99%

Iron and molybdenum valences in double-perovskite (Sr,Nd)2FeMoO6: electron-doping effect

Lindén

Shimada

Motohashi

et al. 2004

Solid State Communications

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“…(Fig. 1) and Curie temperatures close to 410K [6] can be nowadays routinely obtained at laboratory scale (Fig. 2) .…”

Section: Preparation Of Raw Materialsmentioning

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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Antisites and electron-doping effects on the magnetic transition ofSr2FeMoO6double perovskite

Cited by 142 publications

References 17 publications

NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites

NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites

Iron and molybdenum valences in double-perovskite (Sr,Nd)2FeMoO6: electron-doping effect

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

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Antisites and electron-doping effects on the magnetic transition ofSr2FeMoO6double perovskite

Cited by 142 publications

References 17 publications

NMR Study of (Sr,Ba,La)2Fe1+yMo1-yO6Double Perovskites

NMR Study of (Sr,Ba,La)2Fe1+yMo1-yO6Double Perovskites

Iron and molybdenum valences in double-perovskite (Sr,Nd)2FeMoO6: electron-doping effect

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

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NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites

NMR Study of (Sr,Ba,La)₂Fe_1+yMo_1-yO₆Double Perovskites