Large Magnetocaloric effect and magnetic phase transitions in Nd$_2$NiMnO$_6$

Gyaneswar Sharma; Kanika Pasrija; Anzar Ali; Sanjeev Kumar; Yogesh Singh

doi:10.1088/1361-648X/ab151a

Large Magnetocaloric effect and magnetic phase transitions in Nd$_2$NiMnO$_6$

Strongly Correlated Electrons 2025-07-04 v1 Materials Science

Authors: Gyaneswar Sharma , Kanika Pasrija , Anzar Ali , Sanjeev Kumar , Yogesh Singh

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Abstract

We present combined experimental and theoretical investigations on the magnetic and magnetocaloric behavior of Nd $_2$ NiMnO $_6$ . The relative cooling power (RCP) which quantifies the usefulness of a magnetocaloric (MC) material is estimated to be $\approx 300$ J/Kg near the ferromagnetic transition at $T_C \approx 195$ K. This RCP is comparable to the best known MC materials. Additionally, the magnetic entropy change has a broad profile ( $T_C - 50~{\rm K} < T < T_C + 50~{\rm K}$ ) leading to an enhancement in the working-range of temperatures for magnetocaloric based cooling. These features make Nd $_2$ NiMnO $_6$ a superior magnetocaloric material compared for example, to the nonmagnetic counterpart Y $_2$ NiMnO $_6$ . We identify the mechanism for the enhanced RCP which can guide search for future MC materials.

Keywords

magnetocaloric effect magnetic phase transition relative cooling power magnetic entropy change ferromagnetic transition Nd2NiMnO6

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@article{arxiv.1610.07742,
  title  = {Large Magnetocaloric effect and magnetic phase transitions in Nd$_2$NiMnO$_6$},
  author = {Gyaneswar Sharma and Kanika Pasrija and Anzar Ali and Sanjeev Kumar and Yogesh Singh},
  journal= {arXiv preprint arXiv:1610.07742},
  year   = {2025}
}

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4 pages, 4 figures + 1 supplementary figure

Large Magnetocaloric effect and magnetic phase transitions in Nd$_2$NiMnO$_6$

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