Room-temperature antiferromagnetic resonance in NaMnAs
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908916166688768 |
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| author | Dzian, Jan Tázlarů, Stáňa Mohelský, Ivan Mardelé, Florian Le Chudoba, Filip Volný, Jiří Wyzula, Jan Pawbake, Amit Ritarossi, Simone Mazzarello, Riccardo Ritzinger, Philipp Železný, Jakub Výborný, Karel Uhlířová, Klára Grémaud, Benoît Saúl, Andrés Faugeras, Clément Veis, Martin Orlita, Milan |
| author_facet | Dzian, Jan Tázlarů, Stáňa Mohelský, Ivan Mardelé, Florian Le Chudoba, Filip Volný, Jiří Wyzula, Jan Pawbake, Amit Ritarossi, Simone Mazzarello, Riccardo Ritzinger, Philipp Železný, Jakub Výborný, Karel Uhlířová, Klára Grémaud, Benoît Saúl, Andrés Faugeras, Clément Veis, Martin Orlita, Milan |
| contents | We report on antiferromagnetic resonance experiments in bulk tetragonal NaMnAs -- a room-temperature antiferromagnetic semiconductor. Our results corroborate previous ab initio studies, which propose that NaMnAs is an easy-axis antiferromagnet with the Néel vector oriented along the tetragonal axis. At $ B = 0 $, we find a single antiferromagnetic resonance line at 7 meV and associate it with a doubly degenerate ($ k = 0 $) magnon mode. Its energy softens considerably with increasing $ T $, but remains clearly visible in the data up to room temperature. From the experimental data, we estimate the single-ion anisotropy of the Mn ions in NaMnAs to be $ D \approx 0.2 $ meV, a value that is relatively large compared to other manganese-based antiferromagnets. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_25878 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Room-temperature antiferromagnetic resonance in NaMnAs Dzian, Jan Tázlarů, Stáňa Mohelský, Ivan Mardelé, Florian Le Chudoba, Filip Volný, Jiří Wyzula, Jan Pawbake, Amit Ritarossi, Simone Mazzarello, Riccardo Ritzinger, Philipp Železný, Jakub Výborný, Karel Uhlířová, Klára Grémaud, Benoît Saúl, Andrés Faugeras, Clément Veis, Martin Orlita, Milan Materials Science We report on antiferromagnetic resonance experiments in bulk tetragonal NaMnAs -- a room-temperature antiferromagnetic semiconductor. Our results corroborate previous ab initio studies, which propose that NaMnAs is an easy-axis antiferromagnet with the Néel vector oriented along the tetragonal axis. At $ B = 0 $, we find a single antiferromagnetic resonance line at 7 meV and associate it with a doubly degenerate ($ k = 0 $) magnon mode. Its energy softens considerably with increasing $ T $, but remains clearly visible in the data up to room temperature. From the experimental data, we estimate the single-ion anisotropy of the Mn ions in NaMnAs to be $ D \approx 0.2 $ meV, a value that is relatively large compared to other manganese-based antiferromagnets. |
| title | Room-temperature antiferromagnetic resonance in NaMnAs |
| topic | Materials Science |
| url | https://arxiv.org/abs/2603.25878 |