Implementación de una interfaz gráfica para el estudio de propiedades de magnetotransporte en bicapas de manganitas tipo perovskita
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Keywords
Resistividad, magnetorresistencia, Monte Carlo, manganitas, puntos críticos.
Resumen
En este trabajo se presenta un estudio de algunas propiedades de magnetotransporte de bicapas de manganitas ferromagnéticas/antiferromagnéticas (FM/AF) de La 2/3 Ca 1/3 MnO 3 / La 1/3 Ca 2/3 MnO 3 . Este estudio se llevó a cabo empleando el método de Monte Carlo, combinado con el modelo de Drude y Kronig-Penney. Para realizar estas simulaciones se desarrollaron interfaces gráficas que permitieron una interacción amigable con el usuario y además, observar el proceso de las simulaciones en tiempo real. Se obtuvieron resultados de resistividad y magnetorresistencia en función de la temperatura y del campo magnético externo aplicado. Las curvas de resistividad en función de la temperatura presentaron un mínimo alrededor de la temperatura de canteo y un máximo alrededor de la temperatura de Curie, TC. Se observó una disminución en la resistividad y un aumento en la magnetorresistencia con el aumento de campo magnético externo. Por otro lado, las curvas de resistividad en función de la temperatura mostraron una simetría para valores positivos y negativos de campos magnéticos. Además, a bajas temperaturas, por debajo de TC , la resistividad presentó un desdoblamiento produciéndose dos máximos y formado ciclos de histéresis.
PACS:02.70.Uu,75.70.Cn, 28.41.Ak, 75.47.Lx, 75.47.Gk
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