Effects of strain on La0.67-x Prx Ca0.33 MnO3, LaMn1-x Cox O3 and LaMn1-x Nix O3 magnetite samples
Efectos de las tensiones en muestras de magnetitas de La0.67-x Prx Ca0.33 MnO3, LaMn1-x Cox O3 and LaMn1-x Nix O3
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https://doi.org/10.15446/dyna.v86n211.78081Palabras clave:
Magnetite, strain strength, Curie temperature, transition temperature (en)Manganitas, esfuerzos de tensión, esfuerzos de compresión, temperatura de Curie, temperatura de transición (es)
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Se reporta la síntesis y la caracterización de manganitas de La0.67-x Prx Ca0.33 MnO3.LaMn1-x Cox O3 and LaMn1-x Nix O3, con 0.13 ≤ 𝑥𝑥 ≤ 0.67, obtenidas por reacción de estado sólido, y de 𝐿𝐿𝐿𝐿𝑀𝑀𝑀𝑀1−𝑥𝑥(𝐶𝐶𝐶𝐶/𝑁𝑁𝑁𝑁)𝑥𝑥𝑂𝑂3, con 0.0 ≤ 𝑥𝑥 ≤ 0.5, obtenidas por el método sol-gel. Las manganitas se caracterizaron a través de medidas difracción de rayos X, resistividad eléctrica y susceptibilidad magnética en función de la temperatura. Se concluyó que los esfuerzos de tensión y compresión en la red dependen fuertemente del contenido de 𝑃𝑃𝑃𝑃, 𝐶𝐶𝐶𝐶 y 𝑁𝑁𝑁𝑁 en las muestras, y que las temperaturas de transición de las fases metal-aislante y ferromagnética-paramagnética depende fuertemente dichos esfuerzos: a mayor contenido de 𝑃𝑃𝑃𝑃 se produjo mayores esfuerzos de tensión que desplazaron el corrimiento de la transición ferromagnética-paramagnética a temperaturas más bajas, mientras que a mayor contenido de 𝑁𝑁𝑁𝑁 y 𝐶𝐶𝐶𝐶 se produjo mayores esfuerzos de comprensión que desplazaron el corrimiento de las transiciones metal-aislante y ferromagnética-paramagnética a temperaturas más altas
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