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Enlace de túnel magnético esquimiónico totalmente eléctrico

Shaohai Chen1, James Lourembam1, Pin Ho1

  • 1Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.

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Los investigadores desarrollaron una unión de túnel magnético a nanoescala (MTJ) para la lectura de esquimiones magnéticos individuales. Este avance permite una escritura eficiente y de baja energía y la eliminación de skyrmions, allanando el camino para la computación avanzada.

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Área de la Ciencia:

  • La tecnología Spintronics
  • Física de la materia condensada
  • Nanotecnología

Sus antecedentes:

  • Los skyrmions magnéticos son texturas de espín a nanoescala con potencial para el almacenamiento de datos.
  • Un desafío importante es la falta de dispositivos para la lectura eléctrica determinista de los skyrmions individuales.

Objetivo del estudio:

  • Demostrar una realización a escala de obleas de una unión de túnel magnético quiral (MTJ) a nanoescala capaz de alojar y leer esquimiones ambientales individuales.
  • Para permitir la escritura eléctrica determinista y la eliminación de skyrmions con un consumo de energía significativamente reducido.

Principales métodos:

  • Fabricación de uniones de túnel magnético quiral a nanoescala (MTJ) en una escala de obleas.
  • Se utilizaron técnicas de imágenes eléctricas y multimodales para la caracterización de esquimiones.
  • Se han investigado mecanismos complementarios de nucleación para la estabilización de esquimiones.

Principales resultados:

  • Núcleo determinista demostrado de esquimiones individuales con polaridad fija en el MTJ.
  • Logró una gran señal de lectura (20-70%) correlacionada con el tamaño del skyrmion.
  • Realizó tres estados eléctricos no volátiles estabilizando skyrmions de tamaño distinto en el campo cero.
  • Mostró escritura eléctrica y eliminación de skyrmions con energías de conmutación 1.000 veces más bajas que el estado de la técnica.

Conclusiones:

  • La plataforma MTJ desarrollada proporciona una columna vertebral robusta para las arquitecturas de dispositivos skyrmionic totalmente eléctricos.
  • La realización a escala de obleas facilita el aprovechamiento de los skyrmions para la memoria multibit y la computación no convencional.
  • El dispositivo permite la conmutación bidireccional determinista a través de la modificación controlada por voltaje de la energía y la cinética de conmutación.