Understanding the giant barocaloric effects in Mn3AN using inelastic neutron scattering
Materials with large caloric effects offer the opportunity to replace current cooling technologies that require the use of hazardous gases. Barocalorics are particularly appealing, compared to the more well established magneto- and electrocalorics, due to the relative ease with which hydrostatic pressure can be applied. Giant barocaloric effects (BCE) have recently been observed in the geometrically frustrated antiperovskite Mn3GaN at the 1st-order antiferromagnetic transition (TN). Our results on Mn3NiN have revealed yet larger entropy changes, which we interpret as due to differences in the nature of the electronic hybridisation with Mn between the Ni and Ga compounds. We recently performed inelastic neutron scattering experiments on Mn3NiN and Mn3SnN (the latter has zero BCE) at MERLIN to further understand the BCE and found an anomalous phonon temperature dependence close to TN. To further understand these results we plan to measure these features in Mn3GaN to allow a direct comparison with our previous data. This information will provide valuable insight into the origins of the large BCE in these materials and therefore aid our search for yet larger effects in other Mn3AN.
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The recommended format for citing this dataset in a research publication is in the following format:
BOLDRIN David; FAK Bjorn and KOZA Michael Marek. (2021). Understanding the giant barocaloric effects in Mn3AN using inelastic neutron scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-563
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