Author: Yusuke Honda

0000000000451353

AUTHOR

Yusuke Honda

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Spin-resolved low-energy and hard x-ray photoelectron spectroscopy of off-stoichiometric Co2MnSi Heusler thin films exhibiting a record TMR

2015

Half-metallic Co2MnSi-based Heusler compounds have attracted attention because they yield very high tunnelling magnetoresistance (TMR) ratios. Record TMR ratios of 1995% (at 4.2 K) are obtained from off-stoichiometric Co2MnSi-based magnetic tunnel junctions. This work reports on a combination of band structure calculations and spin-resolved and photon-polarisation-dependent photoelectron spectroscopy for off-stoichiometric Heusler thin films with the composition Co2Mn1.30Si0.84. Co and Mn are probed by magnetic dichroism in angle-resolved photoelectron spectroscopy at the 2p core level. In contrast to the delocalised Co 3d states, a pronounced localisation of the Mn 3d states is deduced fro…

Valence (chemistry)Materials scienceAcoustics and UltrasonicsCondensed matter physicsMagnetoresistanceFermi energyDichroismPhoton energyCondensed Matter PhysicsLinear dichroismSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceX-ray photoelectron spectroscopyCondensed Matter::Strongly Correlated ElectronsElectronic band structureJournal of Physics D: Applied Physics

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