Unique magnetic structure of the vdW antiferromagnet VBr$_3$
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909265376051200 |
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| author | Klicpera, Milan Michal, Ondrej Hovancik, David Carva, Karel Rosa, Oscar Ramon Fabelo Orlita, M. Sechovsky, Vladimir Pospisil, Jiri |
| author_facet | Klicpera, Milan Michal, Ondrej Hovancik, David Carva, Karel Rosa, Oscar Ramon Fabelo Orlita, M. Sechovsky, Vladimir Pospisil, Jiri |
| contents | VBr$_3$ is a van der Waals antiferromagnet below the Néel temperature of 26.5 K with a saturation moment of 1.2 mB/f.u. above the metamagnetic transitions detected in the in-plane and out-of-plane directions. To reveal the AFM structure of VBr$_3$ experimentally, we performed a single-crystal neutron diffraction study on a large high-quality crystal. The collected data confirmed a slight monoclinic distortion of the high-temperature rhombohedral structure below 90 K. The magnetic structure was, nevertheless, investigated within the R-3 model. The antiferromagnetic structure propagation vector k = (1, 0, 0.5) was revealed. In an attempt to determine the magnetic structure, 72 non-equivalent magnetic reflections were recorded. The experimental data were confronted with the magnetic space groups dictated by the R-3 lattice symmetry and propagation vector. The best agreement between the experimental data and the magnetic structure model was obtained for the space group P-1.1'_c. The magnetic unit cell of the proposed unique antiferromagnetic structure with periodicity 6c is built from two identical triple layers antiferromagnetically coupled along the c axis. Each triple layer comprises a Néel antiferromagnetic monolayer sandwiched between two antiferromagnetically coupled ferromagnetic monolayers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16253 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unique magnetic structure of the vdW antiferromagnet VBr$_3$ Klicpera, Milan Michal, Ondrej Hovancik, David Carva, Karel Rosa, Oscar Ramon Fabelo Orlita, M. Sechovsky, Vladimir Pospisil, Jiri Materials Science Strongly Correlated Electrons VBr$_3$ is a van der Waals antiferromagnet below the Néel temperature of 26.5 K with a saturation moment of 1.2 mB/f.u. above the metamagnetic transitions detected in the in-plane and out-of-plane directions. To reveal the AFM structure of VBr$_3$ experimentally, we performed a single-crystal neutron diffraction study on a large high-quality crystal. The collected data confirmed a slight monoclinic distortion of the high-temperature rhombohedral structure below 90 K. The magnetic structure was, nevertheless, investigated within the R-3 model. The antiferromagnetic structure propagation vector k = (1, 0, 0.5) was revealed. In an attempt to determine the magnetic structure, 72 non-equivalent magnetic reflections were recorded. The experimental data were confronted with the magnetic space groups dictated by the R-3 lattice symmetry and propagation vector. The best agreement between the experimental data and the magnetic structure model was obtained for the space group P-1.1'_c. The magnetic unit cell of the proposed unique antiferromagnetic structure with periodicity 6c is built from two identical triple layers antiferromagnetically coupled along the c axis. Each triple layer comprises a Néel antiferromagnetic monolayer sandwiched between two antiferromagnetically coupled ferromagnetic monolayers. |
| title | Unique magnetic structure of the vdW antiferromagnet VBr$_3$ |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.16253 |