Magnetothermopower and magnon-assisted transport in ferromagnetic tunnel junctions

Edward McCann; Vladimir I. Fal'Ko

doi:10.1063/1.1519730

Magnetothermopower and magnon-assisted transport in ferromagnetic tunnel junctions

Edward McCann^*
, Vladimir I. Fal'Ko

^*Corresponding author for this work

Lancaster University

Research output: Contribution to journal › Article › peer-review

Abstract

We present a model of the thermopower in a mesoscopic tunnel junction between two ferromagnetic metals based upon magnon-assisted tunneling processes. In our model, the thermopower is generated in the course of thermal equilibration between two baths of magnons, mediated by electrons. We predict a particularly large thermopower effect in the case of a junction between two half-metallic ferromagnets with antiparallel polarizations, S _AP∼-(k_B/e), in contrast to S_P≈0 for a parallel configuration.

Original language	English
Pages (from-to)	3609-3611
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	19
DOIs	https://doi.org/10.1063/1.1519730
Publication status	Published - 4 Nov 2002

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National Graphene Institute

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10.1063/1.1519730

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title = "Magnetothermopower and magnon-assisted transport in ferromagnetic tunnel junctions",

abstract = "We present a model of the thermopower in a mesoscopic tunnel junction between two ferromagnetic metals based upon magnon-assisted tunneling processes. In our model, the thermopower is generated in the course of thermal equilibration between two baths of magnons, mediated by electrons. We predict a particularly large thermopower effect in the case of a junction between two half-metallic ferromagnets with antiparallel polarizations, S AP∼-(kB/e), in contrast to SP≈0 for a parallel configuration.",

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N2 - We present a model of the thermopower in a mesoscopic tunnel junction between two ferromagnetic metals based upon magnon-assisted tunneling processes. In our model, the thermopower is generated in the course of thermal equilibration between two baths of magnons, mediated by electrons. We predict a particularly large thermopower effect in the case of a junction between two half-metallic ferromagnets with antiparallel polarizations, S AP∼-(kB/e), in contrast to SP≈0 for a parallel configuration.

AB - We present a model of the thermopower in a mesoscopic tunnel junction between two ferromagnetic metals based upon magnon-assisted tunneling processes. In our model, the thermopower is generated in the course of thermal equilibration between two baths of magnons, mediated by electrons. We predict a particularly large thermopower effect in the case of a junction between two half-metallic ferromagnets with antiparallel polarizations, S AP∼-(kB/e), in contrast to SP≈0 for a parallel configuration.

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DO - 10.1063/1.1519730

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Magnetothermopower and magnon-assisted transport in ferromagnetic tunnel junctions

Abstract

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