Comparing the anomalous Hall effect and the magneto-optical Kerr effect through antiferromagnetic phase transitions in Mn$_3$Sn
| Autor: | Balk, A. L., Sung, N. H., Thomas, S. M., Rosa, P. F. S., McDonald, R. D., Thompson, J. D., Bauer, E. D., Ronning, F., Crooker, S. A. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Appl. Phys. Lett. 114, 032401 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.5066557 |
| Popis: | In the non-collinear antiferromagnet Mn$_3$Sn, we compare simultaneous measurements of the anomalous Hall effect (AHE) and the magneto-optical Kerr effect (MOKE) through two magnetic phase transitions: the high-temperature paramagnetic/antiferromagnetic phase transition at the N\'eel temperature ($T_N \approx$420~K), and a lower-temperature incommensurate magnetic ordering at $T_1 \approx$270~K. While both the AHE and MOKE are sensitive to the same underlying symmetries of the antiferromagnetic non-collinear spin order, we find that the transition temperatures measured by these two techniques unexpectedly differ by approximately 10~K. Moreover, the applied magnetic field at which the antiferromagnetic order reverses is significantly larger when measured by MOKE than when measured by AHE. These results point to a difference between the bulk and surface magnetic properties of Mn$_3$Sn. Comment: 5 pages, 3 figures; published in APL |
| Databáze: | arXiv |
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