Magnetic ground state, critical analysis of magnetization, and large magnetocaloric effect in the ferromagnetically coupled kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$
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| Format: | Preprint |
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2025
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| _version_ | 1866915410855591936 |
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| author | Choudhary, A. Magar, A. Ghosh, S. Kanungo, S. Nath, R. |
| author_facet | Choudhary, A. Magar, A. Ghosh, S. Kanungo, S. Nath, R. |
| contents | We report a detailed study of the magnetic properties, critical analysis of magnetization, and magnetocaloric effect of a spin-$2$ kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$. The experiments are complemented by the density functional band structure calculations. The magnetic measurements suggest a highly frustrated nature of the compound due to competing ferro- and antiferromagnetic interactions with the dominant one being ferromagnetic. It undergoes a unconventional ferromagnetic ordering at $T^* \simeq 7.8$ K and a field induced metamagnetic transition in low fields, implying spin canting. A $H$-$T$ phase diagram is constructed that features three phase regimes. Indeed, the band structure calculations reveal dominant ferromagnetic interaction along the chains that are coupled antiferromagnetically yielding a frustrated kagome geometry. This compound shows a large magnetocaloric effect with isothermal entropy change $ΔS_{\rm m} \simeq 12$ J/kg-K, adiabatic temperature change $ΔT_{\rm ad} \simeq 8.4$ K, and relative cooling power $RCP \simeq 349$ J/kg for a field change of 7 T. The critical analysis of magnetization and magnetocaloric parameters suggests that the transition is a second order phase transition and it is tricritical mean field type. Owing to it's large magnetocaloric parameters, second order phase transition, and no thermal hysteresis, YCa$_3$(MnO)$_3$(BO$_3$)$_4$ emerges as a potential rare-earth free material for magnetic refrigeration. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_19779 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic ground state, critical analysis of magnetization, and large magnetocaloric effect in the ferromagnetically coupled kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$ Choudhary, A. Magar, A. Ghosh, S. Kanungo, S. Nath, R. Materials Science We report a detailed study of the magnetic properties, critical analysis of magnetization, and magnetocaloric effect of a spin-$2$ kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$. The experiments are complemented by the density functional band structure calculations. The magnetic measurements suggest a highly frustrated nature of the compound due to competing ferro- and antiferromagnetic interactions with the dominant one being ferromagnetic. It undergoes a unconventional ferromagnetic ordering at $T^* \simeq 7.8$ K and a field induced metamagnetic transition in low fields, implying spin canting. A $H$-$T$ phase diagram is constructed that features three phase regimes. Indeed, the band structure calculations reveal dominant ferromagnetic interaction along the chains that are coupled antiferromagnetically yielding a frustrated kagome geometry. This compound shows a large magnetocaloric effect with isothermal entropy change $ΔS_{\rm m} \simeq 12$ J/kg-K, adiabatic temperature change $ΔT_{\rm ad} \simeq 8.4$ K, and relative cooling power $RCP \simeq 349$ J/kg for a field change of 7 T. The critical analysis of magnetization and magnetocaloric parameters suggests that the transition is a second order phase transition and it is tricritical mean field type. Owing to it's large magnetocaloric parameters, second order phase transition, and no thermal hysteresis, YCa$_3$(MnO)$_3$(BO$_3$)$_4$ emerges as a potential rare-earth free material for magnetic refrigeration. |
| title | Magnetic ground state, critical analysis of magnetization, and large magnetocaloric effect in the ferromagnetically coupled kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2507.19779 |