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Las torsiones de transferencia de espín en MnSi en densidades de corriente ultrabajas
F Jonietz1, S Mühlbauer, C Pfleiderer
1Physik-Department E21, Technische Universität München, D-85748 Garching, Germany.
Science (New York, N.Y.)
|December 18, 2010
Resumen
Las corrientes eléctricas manipulan eficientemente los skyrmions magnéticos en el silicio de manganeso. Este avance spintronic utiliza una corriente mínima para girar las estructuras de espín, revelando mecanismos de acoplamiento eficientes.
Área de la Ciencia:
- Spintronics es una empresa de Spintronics.
- Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- La manipulación del espín a través de corrientes eléctricas es crucial para la espintrónica.
- Las celosías de Skyrmion, como las del silicio manganeso, exhiben complejas estructuras de vórtice magnético.
- Comprender la dinámica impulsada por la corriente en estos materiales es clave para los dispositivos futuros.
Objetivo del estudio:
- Para investigar la influencia de las corrientes eléctricas en la estructura magnética del silicio de manganeso a granel.
- Para observar el comportamiento de la red de skyrmion bajo densidades de corriente extremadamente bajas.
Principales métodos:
- Se empleó la dispersión de neutrones para sondear la estructura magnética.
- Se aplicaron corrientes eléctricas controladas a una muestra a granel de silicio de manganeso.
Principales resultados:
- Rotación observada del patrón de difracción en respuesta a las corrientes eléctricas.
- El efecto se logró con corrientes cinco órdenes de magnitud más pequeñas que los valores típicos.
- Se ha demostrado un acoplamiento eficiente entre corrientes de espín no homogéneas y estructuras de espín topológicas.
Conclusiones:
- Las corrientes eléctricas pueden controlar de manera eficiente los esquimiones magnéticos en materiales a granel.
- Los hallazgos sugieren un nuevo mecanismo para la dinámica de magnetización impulsada por corriente.
- Este trabajo abre nuevas vías para dispositivos espintrónicos de baja potencia.
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