Effect of Twinning on Angle-Resolved Photoemission Spectroscopy Analysis of Ni49.7Mn29.1Ga21.2(100) Heusler Alloy
| Autor: | Vladimír Cháb, Václav Drchal, František Máca, Josef Kudrnovský, Stanislav Cichoň, Ján Lančok, Oleg Heczko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Technology
Microscopy QC120-168.85 photoemission spectroscopy shape memory band structure QH201-278.5 martensite Engineering (General). Civil engineering (General) ferromagnetism TK1-9971 Heusler alloys twinning Descriptive and experimental mechanics General Materials Science Electrical engineering. Electronics. Nuclear engineering TA1-2040 |
| Zdroj: | Materials, Vol 15, Iss 717, p 717 (2022) Materials; Volume 15; Issue 3; Pages: 717 |
| ISSN: | 1996-1944 |
| Popis: | To explain the observed features of k-space photoelectron images taken on off-stoichiometric Heusler Ni49.7Mn29.1Ga21.2 single-crystals in the cubic austenitic and pseudotetragonal martensitic phases, the images were simulated theoretically. Despite the moderate structural difference of both phases, there is large difference in photoemission spectra. Analysis of the final states’ structure, matrix elements, and interface barrier scattering was performed to interpret discrepancies between the external photoemission of the austenite and martensite. The missing signal at the surface-normal emission of the martensitic phase is, ultimately, explained by repeated scatterings of escaping electrons on the interfaces between nanotwins. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|