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Rejilla de Skyrmion con un efecto Hall topológico gigante en un imán de red triangular frustrado

  • 0RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan. takashi.kurumaji@riken.jp.
Clinical Neuroscience (new York, N.y.) +

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10 de agosto de 2019

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10 de agosto de 2019

Ver abstracta en PubMed

Resumen

Este resumen es generado por máquina.

Los investigadores descubrieron esquimiones magnéticos en un material centrosimétrico, llamado Gd2PdSi3. Este hallazgo desafía las observaciones anteriores y abre nuevas vías para explorar la electrodinámica emergente en imanes frustrados.

Área De La Ciencia

  • Física de la materia condensada
  • Ciencias de los materiales
  • El magnetismo

Sus Antecedentes

  • Los imanes frustrados geométricamente exhiben texturas de espín complejas y propiedades electromagnéticas no convencionales.
  • La frustración magnética es una vía potencial para realizar estados de espín topológicamente no triviales como los skyrmions magnéticos.
  • Las esquirmiones se han observado predominantemente en estructuras cristalinas no centrosimétricas o en interfaces.

Objetivo Del Estudio

  • Para investigar el surgimiento de los estados de skyrmion en los imanes centrosimétricos frustrados.
  • Para explorar las respuestas electromagnéticas asociadas con estas texturas de giro.

Principales Métodos

  • Síntesis experimental y caracterización de Gd2PdSi3, un imán de red triangular.
  • Medición de la respuesta topológica de Hall para detectar las fases de skyrmion.
  • Diseminación de rayos X de resonancia para sondear la modulación de giro en el plano.

Principales Resultados

  • Observación de un estado de skyrmion de tipo Bloch en el imán centrosimétrico Gd2PdSi3.
  • Una respuesta Hall topológica gigante que indica una fase de skyrmion inducida por el campo.
  • Confirmación de la modulación de espín en el plano utilizando dispersión de rayos X de resonancia.

Conclusiones

  • Los skyrmions magnéticos pueden surgir en materiales centrosimétricos frustrados, contrariamente a las tendencias experimentales anteriores.
  • El estado de skyrmion observado en Gd2PdSi3 exhibe propiedades electromagnéticas únicas.
  • Este descubrimiento allana el camino para explorar la electrodinámica emergente en una nueva clase de materiales magnéticos.

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