Lasers e películas finas

Lasers e películas finas

Saif Ur Rehman

48,63 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
ISBN:
9786208679545
48,63 €
IVA incluido
Disponible

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Nos últimos anos, a técnica de deposição por laser pulsado (PLD) surgiu como um dos métodos mais simples e versáteis para a deposição de películas finas de uma grande variedade de materiais. As remoções estequiométricas de espécies constituintes do alvo durante a ablação, bem como o número relativamente pequeno de parâmetros de controlo, são duas grandes vantagens da PLD em relação a algumas das outras técnicas de deposição física. Os materiais magnéticos englobam uma grande variedade de materiais, que são utilizados numa gama diversificada de aplicações. São utilizados para o armazenamento de dados em cassetes de áudio e vídeo, bem como em discos de computador. No domínio da medicina, são utilizados em scanners corporais. As películas finas monocristalinas de hexaferrite de bário (BaFe12O19) foram depositadas em substrato de safira (Al2O3) utilizando a técnica de deposição por laser de impulsos. O efeito do campo magnético externo na deposição do filme foi investigado. A orientação cristalográfica e a textura foram determinadas utilizando o difratómetro de raios X. Os espectros de reflectância difusa, o bordo de absorção e a energia do intervalo de banda foram determinados por espetrómetro. Os parâmetros magnéticos (coercividade e remanência) foram deduzidos a partir do Magnetómetro de Amostra Vibrante.

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