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Manipulación eléctrica de la inversión de la magnetización en un semiconductor ferromagnético
D Chiba1, M Yamanouchi, F Matsukura
1Laboratory for Electronic Intelligent Systems, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
Science (New York, N.Y.)
|July 12, 2003
Resumen
Los científicos controlaron eléctricamente la magnetización en un semiconductor ferromagnético ajustando la densidad del portador. Esta manipulación eléctrica de la inversión de la magnetización y la desmagnetización ofrece nuevas posibilidades para el almacenamiento de datos de alta densidad. bits.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales Ciencia de los materiales.
- Spintronics es una empresa de Spintronics.
Sus antecedentes:
- Los semiconductores ferromagnéticos utilizan portadores de baja densidad para las interacciones magnéticas.
- El control de la magnetización es crucial para las aplicaciones de almacenamiento de datos.
- Los métodos existentes para el control de la magnetización a menudo son limitados.
Objetivo del estudio:
- Para demostrar la manipulación eléctrica de los procesos de magnetización en semiconductores ferromagnéticos.
- Para investigar el papel de la densidad del portador en la coercitividad magnética.
- Explorar el potencial del control eléctrico en las tecnologías de almacenamiento de datos.
Principales métodos:
- Fabricación de una estructura cerrada con un semiconductor ferromagnético.
- Aplicación de campos eléctricos para modificar la densidad de la portadora.
- Medición de la dinámica de inversión de la magnetización y la fuerza coercitiva (HC).
Principales resultados:
- La manipulación eléctrica de la fuerza coercitiva (HC) se logró alterando la densidad de la portadora.
- Demostración exitosa de la inversión de la magnetización asistida eléctricamente.
- Demostración exitosa de la desmagnetización eléctrica.
Conclusiones:
- La densidad del portador es un factor clave para controlar la magnetización en estos materiales.
- El control eléctrico de la magnetización ofrece una nueva funcionalidad para los materiales magnéticos.
- Este enfoque es prometedor para el desarrollo de bits a nanoescala para el almacenamiento de información de densidad ultra alta.
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