Preparation of Semiconductive La0.6Sr0.4MnO3 Thin Films for Electrode Applications by Using Metal-organic Decomposition

Sun, Ho‐Jung; Park, Chang-Sun

doi:10.3938/jkps.57.994

Cited by 6 publications

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“…Subsequently, the average value was calculated, estimating an error percentage lower than 1 %, and the thickness was estimated by the envelop method, using equation (3) ( Table 1). Variations in LSMO monolayer thickness are due to factors such as solution concentration, temperature, and substrate spinning speed (rpm) that varies according to the resin own nature (volatility of the used solvents) and the air surrounding the substrate during the spinning process [11,22,23]. Table 1 also shows that the refraction index (n) for the LSMO 6-layer thin film decreases to 2.67 due to the possible humidity absorption during the spinning and film drying processes.…”

Section: Resultsmentioning

confidence: 98%

“…Many of these methods required specialized equipment and high consumption of materials and energy, consequently increasing production costs. On the other hand, among the chemical methods, the spin coating technique has been widely used for manganites (e.g., LSMO) thin film deposition; this technique, in contrast to the physical deposition methods, allows to obtain films with simple and low cost equipment [11].…”

Section: Introductionmentioning

confidence: 99%

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Spin Coating technique for obtaining nanometric thin films in the system La0.7Sr0.3MnO3

Mera-Córdoba

Córdoba-Barahona

2017

Rev. Fac. Ing.

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Manganite in the La 0.7 Sr 0.3 MnO 3 system is of great interest due to its potential application in fuel cells, information storage, magnetic field sensors, non-volatile memories, oxygen sensors, and catalysts in the oxidation of light hydrocarbons. Given the scientific relevance of this material, this study describes the procedure to synthesize and characterize thin films of La 0.7 Sr 0.3 MnO 3 . Manganites were synthesized by means of the Pechini method, and deposited on strontium titanate substrates using spin-coating. Both the crystallinity of the films and their phases were studied with X-ray diffraction (XRD), finding that the films are polycrystalline and have a simple cubic structure with a lattice constant a=3.8653 ± 0.066 Ǻ. Scanning electron microscopy (SEM) showed a uniform surface with good morphological features, and the spectrum resulted from the Energy Dispersive X-Ray Spectroscopy (EDS) analysis over the same film was consistent with the molar ratio of the perovskite. Samples of 2, 4, and 6 layers were synthesized, obtaining thicknesses of 75.10 ± 0.01, 75.02 ± 0.01 and 74.07 ± 0.08 nm per monolayer. The results indicate that this method is useful to synthesize films of high crystalline quality and nanometric size.Keywords: manganite; Perovskite; thin films . ResumenLas manganitas en el sistema La 0,7 Sr 0,3 MnO 3 son de gran interés por su potencial aplicación en celdas de combustibles, almacenamiento de información, sensores de campo magnético, memorias no volátiles, sensores de oxígeno y catalizadores en la oxidación de hidrocarburos ligeros; dada la importancia científica que tiene este material, este trabajo presenta el procedimiento de síntesis y caracterización de películas delgadas de La 0,7 Sr 0,3 MnO 3 . Las manganitas se sintetizaron por el método de Pechini y fueron depositadas por Spin Coating en forma de películas delgadas en sustratos de titanato de estroncio. La cristalinidad de las películas y las fases presentes se estudiaron por difracción de rayos-X (DRX), encontrándose que las películas son de naturaleza policristalina y presentan * M. Sc. Institución Universitaria CESMAG (Pasto-Nariño, Colombia). gamera@iucesmag.edu.co. ** Universidad de Nariño (Pasto-Nariño, Colombia). *** M. Sc. Universidad de Nariño (Pasto-Nariño, Colombia). carcob@udenar.edu.co. Fecha de recepción: 7 de junio de 2016 Fecha de aprobación: 20 de noviembre de 2016Jenny Alejandra Mera-Córdoba -María Angélica Mera-Córdoba -Carlos Arturo Córdoba-Barahona Spin Coating technique for obtaining nanometric thin films in the system La0.7Sr0.3MnO3 estructura cúbica simple con contante de red a=3.8653 ± 0,066 Ǻ. La microscopía electrónica de barrido (SEM) muestra una superficie uniforme con buenas características morfológicas, y el espectro EDS medido sobre la misma película mostró consistencia con la relación molar de la perovskita. Se sintetizaron muestras de 2, 4 y 6 capas, obteniendo espesores de 75,10 ± 0,01, 75,02 ± 0,01 y 74,07 ± 0,08 nm por monocapa. Los resultados indican que con este método es posi...

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Spin Coating technique for obtaining nanometric thin films in the system La0.7Sr0.3MnO3

Mera-Córdoba

Córdoba-Barahona

2017

Rev. Fac. Ing.

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“…In recent years, perovskite manganite oxides have been extensively studies because of their particular colossal magnetoresistive property [1]. The studies of the perovskite LaMnO 3 compound doped Sr element are dominant due to its potential applications in thermal control system for satellite [2], or for electrode applications in integrated chips [3] or in fuel cell industry [4]. It has been reported that these oxides undergo metal-insulator transition with temperature variation at a given concentration x [5] which can be interpreted by double exchange mechanism [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sr-Doping Concentration on Structure and Phase-Separation between Ferromagnetic and Paramagnetic Phases in Lanthanum Manganite Oxide

Bao

Guang

Xin

2012

AMR

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The perovskite La1-xSrxMnO3 (LSMO) nanocrystalline compounds with the doping concentration x in the range of 0.2~0.5 have been synthesized by combustion method using the pair of citric acid and ethylene glycol as a burning fuel. It was found that the sintering temperatures at which the compounds began forming the single-phase of LSMO increased from 900 °C up to 1200 °C corresponding to the increasing of Sr-doping content. X-ray pattern investigations presented the crystalline sizes of all samples sintered at 1200 °C evidently reduced from 77.7 nm to 18.9 nm as the doping concentration x increases. The effects of Sr-doping levels on Mn4+/Mn3+ ratio as well as on their electrical resistivity are also studied by X-ray photoelectron spectroscopy and four-point probes method, respectively. By using a resistive approximation model, the role of the Sr-doping with respect to the phase-separation between ferromagnetic and paramagnetic phases with respect to colossal magnetoresistance effect of these compounds is discussed.

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Synthesis of mesoporous La0.7Sr0.3MnO3 thin films for thermoelectric materials

Park

Hong

Shin

et al. 2015

Journal of Alloys and Compounds

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Preparation of Semiconductive La0.6Sr0.4MnO3 Thin Films for Electrode Applications by Using Metal-organic Decomposition

Cited by 6 publications

References 0 publications

Spin Coating technique for obtaining nanometric thin films in the system La0.7Sr0.3MnO3

Spin Coating technique for obtaining nanometric thin films in the system La0.7Sr0.3MnO3

Effect of Sr-Doping Concentration on Structure and Phase-Separation between Ferromagnetic and Paramagnetic Phases in Lanthanum Manganite Oxide

Synthesis of mesoporous La0.7Sr0.3MnO3 thin films for thermoelectric materials

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