Competing interaction driven broad magnetic entropy distribution in triangular net compounds \text{Ba3RE(BO3)3}, RE= Dy and Ho
Abstract
Triangular magnetic lattices have attracted significant attention as a model platform for exploring frustrated magnetism and quantum spin liquids, particularly in rare-earth-based systems. These materials also hold considerable promise for cryogenic magnetic refrigeration. In this work, we investigate the magnetic and magnetocaloric properties of the rare-earth (RE) based compounds Ba3RE(BO3)3 (RE = Dy and Ho). Polycrystalline samples synthesized via a solid-state reaction method crystallize in a hexagonal structure with the space group P63mc, featuring triangular nets separated by approximately 8.8 Å along the c-axis. Detailed magnetic investigation reveals a deviation from pure paramagnetic behavior at low temperatures (T < 20 K). This is further corroborated by isothermal magnetization measurements, which exhibit non-overlapping M vs. H/T plots and reduced magnetization moments, suggesting significant crystal electric field (CEF) splitting of localized f-states. For an applied magnetic field change of 70 kOe, the maximum entropy change (Relative Cooling Power) reaches 4.2 J kg−1 K−1 (204 J kg−1) and 7.3 J kg−1 K−1 (230 J kg−1) for the Dy- and Ho-based compounds, respectively. Overall, the positive slopes of Arrott plots, the universal scaling behaviour of ΔSm/ΔSmmax versus reduced temperature (t), and the field exponent c of the RCP versus H curves indicate a second-order nature of entropy distribution, making them promising candidates for magnetocalorics in the millikelvin range.
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BibTeX
@misc{prajapati2026competing,
title = {{Competing interaction driven broad magnetic entropy distribution in triangular net compounds \textBa$_3$RE(BO$_3$)$_3$, RE= Dy and Ho}},
author = {Krishna Nand Prajapati and Prabuddha Kant Mishra and Shashi B Singh},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.02703},
eprint = {2611.02703},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.02703},
}
RIS
TY - UNPB
TI - Competing interaction driven broad magnetic entropy distribution in triangular net compounds \text{Ba_3RE(BO_3)_3}, RE= Dy and Ho
AU - Krishna Nand Prajapati
AU - Prabuddha Kant Mishra
AU - Shashi B Singh
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.02703
UR - https://arxiv.org/abs/2611.02703
AB - Triangular magnetic lattices have attracted significant attention as a model platform for exploring frustrated magnetism and quantum spin liquids, particularly in rare-earth-based systems. These materials also hold considerable promise for cryogenic magnetic refrigeration. In this work, we investigate the magnetic and magnetocaloric properties of the rare-earth (RE) based compounds Ba_3RE(BO_3)_3 (RE = Dy and Ho). Polycrystalline samples synthesized via a solid-state reaction method crystallize in a hexagonal structure with the space group P6_3mc, featuring triangular nets separated by approximately 8.8 Å along the c-axis. Detailed magnetic investigation reveals a deviation from pure paramagnetic behavior at low temperatures (T < 20 K). This is further corroborated by isothermal magnetization measurements, which exhibit non-overlapping M vs. H/T plots and reduced magnetization moments, suggesting significant crystal electric field (CEF) splitting of localized f-states. For an applied magnetic field change of 70 kOe, the maximum entropy change (Relative Cooling Power) reaches 4.2 J kg^−1 K^−1 (204 J kg^−1) and 7.3 J kg^−1 K^−1 (230 J kg^−1) for the Dy- and Ho-based compounds, respectively. Overall, the positive slopes of Arrott plots, the universal scaling behaviour of ΔS_m/ΔS_m^max versus reduced temperature (t), and the field exponent c of the RCP versus H curves indicate a second-order nature of entropy distribution, making them promising candidates for magnetocalorics in the millikelvin range.
ER -