|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Information Science and Technology / Faculty of Information Science and Technology >
Peer-reviewed Journal Articles, etc >
Surface spin polarization of the nonstoichiometric Heusler alloy Co2MnSi
| Title: | Surface spin polarization of the nonstoichiometric Heusler alloy Co2MnSi |
| Authors: | Wüstenberg, Jan-Peter Browse this author | | Fetzer, Roman Browse this author | | Aeschlimann, Martin Browse this author | | Cinchetti, Mirko Browse this author | | Minár, Jan Browse this author | | Braun, Jürgen Browse this author | | Ebert, Hubert Browse this author | | Ishikawa, Takayuki Browse this author | | Uemura, Tetsuya Browse this author | | Yamamoto, Masafumi Browse this author →KAKEN DB |
| Issue Date: | 1-Feb-2012 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 85 |
| Issue: | 6 |
| Start Page: | 064407 |
| Publisher DOI: | 10.1103/PhysRevB.85.064407 |
| Abstract: | Using a combined approach of spin-resolved photoemission spectroscopy, band structure and photoemission calculations we investigate the influence of bulk defects and surface states on the spin polarization of nonstoichiometric Co2MnαSi thin films (with α = 0.69 and α = 1.19) with bulk L2_[1] order. We find that for Mn-poor alloys the spin polarization at the Fermi energy (E_[F]) is negative due to the presence of Co_[Mn] antisite and minority surface state contributions. In Mn-rich alloys, the suppression of Co_[Mn] antisites leads to a positive spin polarization at E_[F], and the influence of minority surface states on the photoelectron spin polarization is reduced. |
| Rights: | ©2012 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/48550 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 山本 眞史
|
