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Observación de esquimiones en un material multiferroico
1Department of Applied Physics, University of Tokyo, Tokyo, Japan. seki@ap.t.u-tokyo.ac.jp
Science (New York, N.Y.)
|April 14, 2012
Resumen
Los investigadores descubrieron esquimiones magnetoeléctricos en imanes aislantes. Estos skyrmions inducen la polarización eléctrica, permitiendo potencialmente el control del campo eléctrico sin pérdida de energía.
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:
- Los skyrmions magnéticos son topológicamente estables, con texturas de espín de vórtice de tipo partícula a nanoescala.
- Observados en materiales metálicos, los skyrmions son controlables a través de corrientes eléctricas.
- Los imanes aislantes ofrecen ventajas potenciales para la manipulación de los skyrmion.
Objetivo del estudio:
- Descubrir y caracterizar experimentalmente esquimiones magnetoeléctricos en un material aislante.
- Para investigar el acoplamiento magnetoeléctrico en estas nuevas estructuras skyrmion.
- Para explorar aplicaciones potenciales en la manipulación de skyrmion de baja pérdida.
Principales métodos:
- Microscopía electrónica de transmisión de Lorentz (LTEM) para imágenes directas de las texturas de espín de skyrmion.
- Mediciones de susceptibilidad magnética para sondear las propiedades magnéticas.
- Análisis de los efectos magnetoeléctricos inducidos por los skyrmions.
Principales resultados:
- Descubrimiento experimental de esquimiones en el imán de celosía quiral aislante Cu(2)OSeO(3).
- Demostración de que los skyrmions inducen magnéticamente la polarización eléctrica.
- Observación del acoplamiento magnetoeléctrico en el sistema de esquimión aislante.
Conclusiones:
- Los skyrmions magnetoeléctricos se han realizado experimentalmente en el aislamiento de Cu{2) OSeO{3).
- El acoplamiento magnetoeléctrico observado ofrece una vía para el control del campo eléctrico de los skyrmions.
- Este hallazgo abre posibilidades para dispositivos espintrónicos energéticamente eficientes.
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