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Zhaochu Luo^1,2, Trong Phuong Dao^3,2,4, Aleš Hrabec^3,2,4

¹Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland. zhaochu.luo@psi.ch laura.heyderman@psi.ch pietro.gambardella@mat.ethz.ch.

Science (New York, N.Y.)

|March 30, 2019

Resumen

Los investigadores lograron un fuerte acoplamiento entre nanomágnetos adyacentes lateralmente utilizando la interacción interfacial Dzyaloshinskii-Moriya. Este avance permite nuevos diseños para puertas lógicas magnéticas y dispositivos de memoria con control totalmente eléctrico.

Área de la Ciencia:

Física de la materia condensada
Ciencias de los materiales
Nanotecnología

Sus antecedentes:

Los nanomagnéticos acoplados magnéticamente son cruciales para las memorias no volátiles, las puertas lógicas y los sensores.
El apilamiento vertical ha sido el método más eficaz para lograr el acoplamiento magnético.
El acoplamiento lateral de nanomagnetos presenta desafíos y oportunidades para nuevas arquitecturas de dispositivos.

Objetivo del estudio:

Para lograr un fuerte acoplamiento magnético entre nanomágnetos adyacentes lateralmente.
Explorar el uso de la interacción interfacial Dzyaloshinskii-Moriya para el acoplamiento de nanomagnéticos.
Demostrar nuevas funcionalidades y aplicaciones de dispositivos basados en el acoplamiento de nanomagnéticos laterales.

Principales métodos:

Utilizó la interacción interfacial Dzyaloshinskii-Moriya para mediar el acoplamiento entre nanomagnets laterales.
Acoplamiento investigado mediado por paredes de dominio quirales entre regiones magnéticas fuera del plano y dentro del plano.
Estudió el comportamiento de los nanomagnets por debajo de un tamaño crítico donde este acoplamiento domina.

Principales resultados:

Se logró un fuerte acoplamiento entre nanomágnetos adyacentes lateralmente.
Se ha demostrado un sesgo de intercambio lateral y una conmutación inducida por corriente libre de campo.
Realizó configuraciones magnéticas de varios estados, antiferromagnetos sintéticos, esquimiones y espinos artificiales.
Cubre una amplia gama de escalas de longitud y topologías en sistemas magnéticos.

Conclusiones:

La interacción interfacial Dzyaloshinskii-Moriya proporciona un poderoso mecanismo para el acoplamiento de nanomagnéticos laterales.
Este acoplamiento permite el diseño de matrices de nanomagnéticos correlacionados.
Ofrece una plataforma para el control totalmente eléctrico de puertas lógicas planas y dispositivos de memoria.

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