Abstract

Band-gap engineering is one of the fundamental techniques in semiconductor technology and also applicable in next generation spintronics using the spin degree of freedom. To fully utilize the spintronic materials, it is essential to optimize the spin-dependent electronic structures in the operando conditions by applying magnetic and/or electric fields. Here we present an advanced spectroscopic technique to probe the spin-polarized electronic structures by using magnetic circular dichroism (MCD) in resonant inelastic soft X-ray scattering (RIXS) under an external magnetic field. Thanks to the spin-selective dipole-allowed transitions in RIXS-MCD, we have successfully demonstrated the direct evidence of the perfectly spin-polarized electronic structures for the prototypical halfmetallic Heusller alloy Co2MnSi. RIXS-MCD is a promising tool to probe the spin-dependent carriers and band-gap induced in the buried magnetic layers in an element specific way under the operando conditions.

Details

Title
Detecting halfmetallic electronic structures of spintronic materials in a magnetic field
Author
Fujiwara, H 1 ; Umetsu, R Y 2 ; Kuroda, F 3 ; Miyawaki, J 4 ; Kashiuchi, T 1 ; Nishimoto, K 1 ; Nagai, K 1 ; Sekiyama, A 1 ; Irizawa, A 3 ; Takeda, Y 5 ; Saitoh, Y 5 ; Oguchi, T 6 ; Harada, Y 7 ; Suga, S 8 

 Osaka University, Division of Materials Physics, Graduate School of Engineering Science, Toyonaka, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971) 
 Tohoku University, Institute for Materials Research, Sendai, Japan (GRID:grid.69566.3a) (ISNI:0000 0001 2248 6943); Tohoku University, Center for Spintronics Research Network, Sendai, Japan (GRID:grid.69566.3a) (ISNI:0000 0001 2248 6943); Center for Science and Innovation in Spintronics, Sendai, Japan (GRID:grid.69566.3a) 
 SANKEN, Osaka University, Ibaraki, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971) 
 The University of Tokyo, Institute for Solid State Physics, Kashiwa, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2151 536X); Synchrotron Radiation Research Organization, The University of Tokyo, Sayo, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2151 536X); Institute for Advanced Synchrotron Light Source, National Institutes for Quantum and Radiological Science and Technology, Sendai, Japan (GRID:grid.482503.8) (ISNI:0000 0004 5900 003X) 
 Materials Sciences Research Center, Japan Atomic Energy Agency (JAEA), Sayo, Japan (GRID:grid.20256.33) (ISNI:0000 0001 0372 1485) 
 SANKEN, Osaka University, Ibaraki, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971); Osaka University, Center for Spintronics Research Network, Toyonaka, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971) 
 The University of Tokyo, Institute for Solid State Physics, Kashiwa, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2151 536X); Synchrotron Radiation Research Organization, The University of Tokyo, Sayo, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2151 536X) 
 SANKEN, Osaka University, Ibaraki, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971); Forschungszentrum Jülich, PGI-6, Jülich, Germany (GRID:grid.8385.6) (ISNI:0000 0001 2297 375X) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2574556716
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.