Large anomalous Hall effect in L12-ordered antiferromagnetic Mn3Ir thin films
| Autor: | Motoi Kimata, Kent Oda, Tetsuya Ikebuchi, Takahiro Moriyama, Yoichi Shiota, Teruo Ono, Hiroyuki Iwaki, Yuta Kobayashi |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Condensed matter physics 02 engineering and technology Spin structure 021001 nanoscience & nanotechnology 01 natural sciences Condensed Matter::Materials Science Crystallinity Magnetization Ferromagnetism Hall effect Phase (matter) 0103 physical sciences Antiferromagnetism Thin film 0210 nano-technology |
| Zdroj: | Applied Physics Letters. 116:022408 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | Antiferromagnets having negligible net magnetization but a topologically nontrivial spin structure are a good testbed for investigating the intrinsic anomalous Hall effect (AHE). In this Letter, we explore L12-ordered Mn3Ir thin films, which are one of the noncollinear antiferromagnets predicted to exhibit the intrinsic AHE due to their topologically nontrivial spin structure. The anomalous Hall conductivity as large as σAHE = 40 Ω−1 cm−1 was observed at R.T. This value can be translated to the anomalous Hall conductivity per net magnetization M as |σAHE/M| = 0.6 V−1, which is much larger compared to those for general ferromagnetic materials. We also show that σAHE depends on the crystallinity of Mn3Ir as well as the chemical order parameter S characterizing a content of the L12 phase. Our results experimentally verify that L12-ordered Mn3Ir thin films exhibit the topologically originated AHE. |
| Databáze: | OpenAIRE |
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