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Observación del efecto anisotrópico de Peltier en el níquel

Ken-Ichi Uchida^1,2,3,4, Shunsuke Daimon^5,6,7, Ryo Iguchi⁸

¹National Institute for Materials Science, Tsukuba, Japan. UCHIDA.Kenichi@nims.go.jp.

|May 23, 2018

Resumen

Los investigadores demuestran el enfriamiento y el calentamiento Peltier en un solo material, desafiando la necesidad de uniones. Esto se logra a través de un efecto magneto-Peltier anisotrópico en ferromagnetos, lo que permite una nueva gestión térmica en dispositivos electrónicos.

Área de la Ciencia:

Física de la materia condensada
Ciencias de los materiales
Termoelectricidad

Sus antecedentes:

El efecto Peltier tradicionalmente requiere uniones de materiales diferentes para el enfriamiento/calentamiento termoeléctrico.
El entendimiento convencional dicta que los dispositivos termoeléctricos dependen de las interfaces entre materiales con diferentes coeficientes de Peltier.

Objetivo del estudio:

Para demostrar el enfriamiento y el calentamiento Peltier dentro de un solo material, eliminando la necesidad de uniones.
Investigar el efecto anisotrópico magneto-Peltier en los ferromagnetos como un nuevo fenómeno termoeléctrico.

Principales métodos:

Se utilizaron técnicas de termografía activa para observar los cambios de temperatura.
Experimentado con una losa de níquel simple para estudiar el efecto anisotrópico de Peltier.
Manipuló las configuraciones de la corriente de carga y la magnetización en el ferromagnético.

Principales resultados:

Se ha demostrado con éxito el enfriamiento y el calentamiento Peltier en una sola losa de níquel sin necesidad de uniones de material.
Demostró que las propiedades termoeléctricas se pueden ajustar alterando las configuraciones de corriente y magnetización.
Confirmó la idoneidad del níquel para este efecto y destacó el papel de la interacción espín-órbita.

Conclusiones:

El efecto anisotrópico magneto-Peltier ofrece una nueva vía para aplicaciones termoeléctricas en sistemas de un solo material.
Este efecto es la contraparte magnética del efecto magneto-Seebeck anisotrópico, llenando un vacío en la termoelectricidad ferromagnética.
La simplicidad de este fenómeno es prometedora para el desarrollo de soluciones avanzadas de gestión térmica para dispositivos electrónicos y espintrónicos.

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