Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature
The crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses he...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/3/1019 |
| _version_ | 1797486654284365824 |
|---|---|
| author | Ryszard Zdyb Krisztián Palotás Eszter Simon Tomasz Jaroch Zbigniew Korczak |
| author_facet | Ryszard Zdyb Krisztián Palotás Eszter Simon Tomasz Jaroch Zbigniew Korczak |
| author_sort | Ryszard Zdyb |
| collection | DOAJ |
| description | The crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses hexagonal symmetry and reveals a ferromagnetic order at room temperature. We experimentally demonstrate the possibility of tuning the Curie temperature and the magnitude of magnetization of the Fe monolayer by capping with Au. Taking into account several structural models, the calculation results mostly show ferromagnetic states with enhanced magnetic moments of Fe atoms compared to their bulk value and a further increase in their value after covering with Au. The theoretically calculated Curie temperatures are in fair agreement with those obtained in the experiments. The calculations, furthermore, found evidence for the presence of frustrated isotropic Fe–Fe exchange interactions, and a discussion of the structural effects on the magnetic properties is provided herein. |
| first_indexed | 2024-03-09T23:36:21Z |
| format | Article |
| id | doaj.art-b1f7fd2ad9cc47c3987fa11913445a5c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:36:21Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b1f7fd2ad9cc47c3987fa11913445a5c2023-11-23T17:00:56ZengMDPI AGMaterials1996-19442022-01-01153101910.3390/ma15031019Tuning Ferromagnetism in a Single Layer of Fe above Room TemperatureRyszard Zdyb0Krisztián Palotás1Eszter Simon2Tomasz Jaroch3Zbigniew Korczak4Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, PolandWigner Research Center for Physics, Institute for Solid State Physics and Optics, Konkoly-Thege M. Str. 29-33, 1121 Budapest, HungaryDepartment of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, HungaryInstitute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, PolandInstitute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, PolandThe crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses hexagonal symmetry and reveals a ferromagnetic order at room temperature. We experimentally demonstrate the possibility of tuning the Curie temperature and the magnitude of magnetization of the Fe monolayer by capping with Au. Taking into account several structural models, the calculation results mostly show ferromagnetic states with enhanced magnetic moments of Fe atoms compared to their bulk value and a further increase in their value after covering with Au. The theoretically calculated Curie temperatures are in fair agreement with those obtained in the experiments. The calculations, furthermore, found evidence for the presence of frustrated isotropic Fe–Fe exchange interactions, and a discussion of the structural effects on the magnetic properties is provided herein.https://www.mdpi.com/1996-1944/15/3/1019ultrathin ferromagnetic filmsFeSPLEEMDFT |
| spellingShingle | Ryszard Zdyb Krisztián Palotás Eszter Simon Tomasz Jaroch Zbigniew Korczak Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature Materials ultrathin ferromagnetic films Fe SPLEEM DFT |
| title | Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature |
| title_full | Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature |
| title_fullStr | Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature |
| title_full_unstemmed | Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature |
| title_short | Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature |
| title_sort | tuning ferromagnetism in a single layer of fe above room temperature |
| topic | ultrathin ferromagnetic films Fe SPLEEM DFT |
| url | https://www.mdpi.com/1996-1944/15/3/1019 |
| work_keys_str_mv | AT ryszardzdyb tuningferromagnetisminasinglelayeroffeaboveroomtemperature AT krisztianpalotas tuningferromagnetisminasinglelayeroffeaboveroomtemperature AT esztersimon tuningferromagnetisminasinglelayeroffeaboveroomtemperature AT tomaszjaroch tuningferromagnetisminasinglelayeroffeaboveroomtemperature AT zbigniewkorczak tuningferromagnetisminasinglelayeroffeaboveroomtemperature |