DOAJ Open Access 2025

Magnetic memory and distinct spin populations in ferromagnetic Co3Sn2S2

Charles Menil Brigitte Leridon Antonella Cavanna Ulf Gennser Dominique Mailly +5 lainnya

Abstrak

Abstract Co3Sn2S2, a ferromagnetic Weyl semi-metal with Co atoms on a kagome lattice, has generated much recent attention. Experiments have identified a temperature scale below the Curie temperature. Here, we find that this magnet keeps a memory, when not exposed to a magnetic field sufficiently large to erase it. We identify the driver of this memory effect as a small secondary population of spins, whose coercive field is significantly larger than that of the majority spins. The shape of the magnetization hysteresis curve has a threshold magnetic field set by the demagnetizing factor. These two field scales set the hitherto unidentified temperature scale, which is not a thermodynamic phase transition, but a crossing point between meta-stable boundaries. Global magnetization is well-defined, even when it is non-uniform, but drastic variations in local magnetization point to a coarse energy landscape, with the thermodynamic limit not achieved at micrometer length scales.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (10)

Charles Menil

Brigitte Leridon

Antonella Cavanna

Ulf Gennser

Dominique Mailly

Linchao Ding

Xiaokang Li

Zengwei Zhu

Benoît Fauqué

Kamran Behnia

Format Sitasi

APA MLA BibTeX

Menil, C., Leridon, B., Cavanna, A., Gennser, U., Mailly, D., Ding, L. et al. (2025). Magnetic memory and distinct spin populations in ferromagnetic Co3Sn2S2. https://doi.org/10.1038/s41535-025-00739-6

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1038/s41535-025-00739-6
Akses: Open Access ✓