English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

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

Fetzer, R., Ouardi, S., Honda, Y., Liu, H.-x., Chadov, S., Balke, B., et al. (2015). Spin-resolved low-energy and hard x-ray photoelectron spectroscopy of off-stoichiometric Co2MnSi Heusler thin films exhibiting a record TMR. Journal of Physics D: Applied Physics, 48: 164002, pp. 1-12. doi:10.1088/0022-3727/48/16/164002.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CB06-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CB07-8
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Fetzer, Roman1, Author
Ouardi, Siham2, Author              
Honda, Yusuke1, Author
Liu, Hong-xi1, Author
Chadov, Stanislav3, Author              
Balke, Benjamin1, Author
Ueda, Shigenori1, Author
Suzuki, Motohiro1, Author
Uemura, Tetsuya1, Author
Yamamoto, Masafumi1, Author
Aeschlimann, Martin1, Author
Cinchetti, Mirko, Author              
Fecher, Gerhard H.4, Author              
Felser, Claudia5, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
3Stanislav Chadov, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863440              
4Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

Content

show
hide
Free keywords: -
 Abstract: 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 from the corresponding 2p core level spectra. The valence states are investigated by linear dichroism using both hard x-ray and very-low-photon-energy excitation. When a very low photon energy is used for excitation, the valence bands exhibit a spin polarisation of about 30% at the Fermi energy. First principles calculations reveal that the low spin polarisation might be caused by a spin-flip process in the photoelectron final states.

Details

show
hide
Language(s): eng - English
 Dates: 2015-04-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Physics D: Applied Physics
  Abbreviation : J. Phys. D: Appl. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 48 Sequence Number: 164002 Start / End Page: 1 - 12 Identifier: ISSN: 0022-3727
CoNE: /journals/resource/0022-3727