Magnetoelastic coupling in the stretched diamond lattice of TbTaO$_4$
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909669337858048 |
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| author | Zhang, Xiaotian Kelly, Nicola Sheptyakov, Denis Liu, Cheng Deng, Shiyu Saxena, Siddharth Dutton, Siân |
| author_facet | Zhang, Xiaotian Kelly, Nicola Sheptyakov, Denis Liu, Cheng Deng, Shiyu Saxena, Siddharth Dutton, Siân |
| contents | The magnetic structure of diamond-like lattice has been studied extensively in terms of the magnetic frustration. Here we report the distortion of stretched diamond lattice of Tb$^{3+}$ (4$f^8$) in M-TbTaO$_4$ on application of a magnetic field. We have investigated the structural and magnetic properties of M phase terbium tantalate M-TbTaO$_4$ as a function of temperature and magnetic field using magnetometry and powder neutron diffraction. Sharp $λ$-shape transitions in $d(χT)/dT$, $dM/dH$ and specific heat data confirm the previously reported three-dimensional (3D) antiferromagnetic ordering at $T_N \approx 2.25$ K. On application of a magnetic field the Néel temperature is found to decrease and variable field neutron diffraction experiments below $T_N$ at 1.6 K show an increase in both the bond and angle distortion of the stretched diamond lattice with magnetic field, indicating a potential magneto-elastic coupling effect. By combining our magnetometry, heat capacity and neutron diffraction results we generate a magnetic phase diagram for M-TbTaO$_4$ as a function of temperature and field. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_15989 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetoelastic coupling in the stretched diamond lattice of TbTaO$_4$ Zhang, Xiaotian Kelly, Nicola Sheptyakov, Denis Liu, Cheng Deng, Shiyu Saxena, Siddharth Dutton, Siân Strongly Correlated Electrons Materials Science The magnetic structure of diamond-like lattice has been studied extensively in terms of the magnetic frustration. Here we report the distortion of stretched diamond lattice of Tb$^{3+}$ (4$f^8$) in M-TbTaO$_4$ on application of a magnetic field. We have investigated the structural and magnetic properties of M phase terbium tantalate M-TbTaO$_4$ as a function of temperature and magnetic field using magnetometry and powder neutron diffraction. Sharp $λ$-shape transitions in $d(χT)/dT$, $dM/dH$ and specific heat data confirm the previously reported three-dimensional (3D) antiferromagnetic ordering at $T_N \approx 2.25$ K. On application of a magnetic field the Néel temperature is found to decrease and variable field neutron diffraction experiments below $T_N$ at 1.6 K show an increase in both the bond and angle distortion of the stretched diamond lattice with magnetic field, indicating a potential magneto-elastic coupling effect. By combining our magnetometry, heat capacity and neutron diffraction results we generate a magnetic phase diagram for M-TbTaO$_4$ as a function of temperature and field. |
| title | Magnetoelastic coupling in the stretched diamond lattice of TbTaO$_4$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2501.15989 |