Large magneto-Seebeck effect in magnetic tunnel junctions with half-metallic Heusler electrodes.

ABSTRACT: Spin caloritronics studies the interplay between charge-, heat- and spin-currents, which are initiated by temperature gradients in magnetic nanostructures. A plethora of new phenomena has been discovered that promises, e.g., to make wasted heat in electronic devices useable or to provide new read-out mechanisms for information. However, only few materials have been studied so far with Seebeck voltages of only some microvolt, which hampers applications. Here, we demonstrate that half-metallic Heusler compounds are hot candidates for enhancing spin-dependent thermoelectric effects. This becomes evident when considering the asymmetry of the spin-split density of electronic states around the Fermi level that determines the spin-dependent thermoelectric transport in magnetic tunnel junctions. W

SUBMITTER: Boehnke A 

PROVIDER: S-EPMC5696366 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature