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Escribir y borrar esquimiones magnéticas individuales
Niklas Romming1, Christian Hanneken, Matthias Menzel
1Institute of Applied Physics, University of Hamburg, D-20355 Hamburg, Germany.
Science (New York, N.Y.)
|August 10, 2013
Resumen
Los investigadores demostraron la escritura controlada y la eliminación de esquimiones magnéticos individuales en películas ultrafinas utilizando corrientes polarizadas por espín. Esto pone de relieve el potencial de la carga topológica para el almacenamiento de información avanzada.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Las texturas de espín topológicamente no triviales son cruciales para las aplicaciones de dispositivos espintrónicos.
- El control de los skyrmions magnéticos individuales es un desafío clave en el campo.
Objetivo del estudio:
- Para investigar la creación controlada y la aniquilación de esquimiones magnéticos individuales.
- Explorar el potencial de la carga topológica para futuros conceptos de almacenamiento de información.
Principales métodos:
- Utilizó una película magnética ultradelgada.
- Empleó corrientes polarizadas de espín locales de un microscopio de túnel de barrido para escribir y eliminar skyrmions.
- Ajusta el campo magnético externo y la temperatura para controlar el paisaje energético y evitar la conmutación térmica.
Principales resultados:
- Demostró la capacidad de escribir y eliminar esquimiones magnéticos individuales de una manera controlada.
- Se demostró que la velocidad y la dirección de conmutación son controlables a través de parámetros de inyección de corriente.
- Se confirmó la estabilidad de los skyrmions en condiciones controladas.
Conclusiones:
- Los skyrmions magnéticos individuales se pueden manipular con alta precisión utilizando corrientes polarizadas por espín.
- Los hallazgos subrayan el potencial significativo de utilizar la carga topológica en las tecnologías de almacenamiento de información de próxima generación.
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