2026-09-19T22:58:25Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1541632024-04-17T03:31:56Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Jaramillo, Rafael
Song, Samuel W.
Massachusetts Institute of Technology. Department of Materials Science and Engineering
2024-04-16T19:04:46Z
2024-04-16T19:04:46Z
2023-06
2024-04-02T14:58:03.967Z
https://hdl.handle.net/1721.1/154163
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.
Massachusetts Institute of Technology
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Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr
Thesis
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Bachelor
Bachelor of Science in Materials Science and Engineering
Publication
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<Abstract>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.</Abstract>
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