Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr
The van der Waals semiconductor CrSBr stands out as a promising 2D magnetic material due to its high ferromagnetic ordering temperature (135 K), near-infrared direct bandgap (1.5 eV), and stability in air. In this thesis we report on the detection of a low-temperature magnetic order in annealed CrSB...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Published: |
Massachusetts Institute of Technology
2024
|
| Online Access: | https://hdl.handle.net/1721.1/154163 |
| _version_ | 1811086045532389376 |
|---|---|
| author | Song, Samuel W. |
| author2 | Jaramillo, Rafael |
| author_facet | Jaramillo, Rafael Song, Samuel W. |
| author_sort | Song, Samuel W. |
| collection | MIT |
| description | The van der Waals semiconductor CrSBr stands out as a promising 2D magnetic material due to its high ferromagnetic ordering temperature (135 K), near-infrared direct bandgap (1.5 eV), and stability in air. In this thesis we report on the detection of a low-temperature magnetic order in annealed CrSBr bulk single crystals using SQUID magnetometry. The order manifests as a broad bump centered at 75 K in magnetization measurements. We deduce that the order is the magnetic contribution of secondary phases, which we image and identify via SEM-EDS analysis. We determine that the secondary phase Cr₂S₃ is formed during annealing at 750°C or above and that the secondary phase CrBr₃ is also formed during annealing at 850°C. |
| first_indexed | 2024-09-23T13:19:41Z |
| format | Thesis |
| id | mit-1721.1/154163 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:19:41Z |
| publishDate | 2024 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1541632024-04-17T03:31:56Z Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr Song, Samuel W. Jaramillo, Rafael Massachusetts Institute of Technology. Department of Materials Science and Engineering The van der Waals semiconductor CrSBr stands out as a promising 2D magnetic material due to its high ferromagnetic ordering temperature (135 K), near-infrared direct bandgap (1.5 eV), and stability in air. In this thesis we report on the detection of a low-temperature magnetic order in annealed CrSBr bulk single crystals using SQUID magnetometry. The order manifests as a broad bump centered at 75 K in magnetization measurements. We deduce that the order is the magnetic contribution of secondary phases, which we image and identify via SEM-EDS analysis. We determine that the secondary phase Cr₂S₃ is formed during annealing at 750°C or above and that the secondary phase CrBr₃ is also formed during annealing at 850°C. S.B. 2024-04-16T19:04:46Z 2024-04-16T19:04:46Z 2023-06 2024-04-02T14:58:03.967Z Thesis https://hdl.handle.net/1721.1/154163 In Copyright - Educational Use Permitted Copyright retained by author(s) https://rightsstatements.org/page/InC-EDU/1.0/ application/pdf Massachusetts Institute of Technology |
| spellingShingle | Song, Samuel W. Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title | Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title_full | Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title_fullStr | Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title_full_unstemmed | Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title_short | Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr |
| title_sort | explaining a low temperature magnetic order in annealed van der waals semiconductor crsbr |
| url | https://hdl.handle.net/1721.1/154163 |
| work_keys_str_mv | AT songsamuelw explainingalowtemperaturemagneticorderinannealedvanderwaalssemiconductorcrsbr |