Abstract
The search for energy-efficient and environmentally friendly cooling technologies is a key driver for the development of magnetic refrigeration based on the magnetocaloric effect (MCE). This phenomenon arises from the interplay between magnetic and lattice degrees of freedom that is strong in certain materials, leading to a change in temperature upon application or removal of a magnetic field. Here we explore in detail an emerging material, Mn1-xFexNiSi0.95Al0.05, with an exceptionally large isothermal entropy at room temperature. By combining experimental and theoretical methods we outline the microscopic mechanism behind the large MCE in this material. It is demonstrated that the competition between the Ni2In-Type hexagonal phase and the TiNiSi-Type orthorhombic phase, that coexist in this system, combined with the distinctly different magnetic properties of these phases, is a key parameter for the functionality of this material for magnetic cooling.
| Original language | English |
|---|---|
| Article number | 124401 |
| Journal | Physical Review Materials |
| Volume | 8 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 3 Dec 2024 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors thank the Swedish Foundation for Strategic Research (SSF), project \u201CMagnetic materials for green energy technology\u201D (Contract No. EM-16-0039) for financial support. The authors acknowledge support from STandUPP and eSSENCE. R.M.V and T.B. acknowledge support from the Magnus Ehrnrooth Foundation. R.M.V. thanks Nuno Fortunato for the discussion related to the Debye model calculations. E.D., O.E., and M.S. acknowledge support from the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation (KAW). O.E. acknowledges support from the Swedish Research Council (VR) and the ERC (FASTCORR project). M.S. Acknowledges support from the Swedish Research Council (grant 2022-03069). S.I.S. acknowledge the support from the Swedish Research Council (VR) (Grant No. 2023-05247), and the Swedish Government Strategic Research Areas in Materials Science on Functional Materials at Link\u00F6ping University (Faculty Grant SFO-Mat-LiU No. 2009-00971). The computations were enabled by resources provided by the National Academic Infrastructure for Supercomputing in Sweden (NAISS), partially funded by the Swedish Research Council through Grant Agreements No. 2022-06725 and No. 2018-05973, and by the CSCIT Center for Science, Finland. O.E and E.D. acknowledge support from the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation (KAW). The authors thank the Swedish Foundation for Strategic Research (SSF), project-Magnetic materials for green energy technology (Contract No. EM-16-0039) for financial support. The authors acknowledge support from STandUPP and eSSENCE. R.M.V and T.B. acknowledge support from the Magnus Ehrnrooth Foundation. R.M.V.Thanks Nuno Fortunato for the discussion related to the Debye model calculations. E.D., O.E., and M.S. acknowledge support from the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation (KAW). O.E. acknowledges support from the Swedish Research Council (VR) and the ERC (FASTCORR project). M.S. Acknowledges support from the Swedish Research Council (grant 2022-03069). S.I.S. acknowledge the support from the Swedish Research Council (VR) (Grant No. 2023-05247), and the Swedish Government Strategic Research Areas in Materials Science on Functional Materials at Link\u00C3 ping University (Faculty Grant SFO-Mat-LiU No. 2009-00971). The computations were enabled by resources provided by the National Academic Infrastructure for Supercomputing in Sweden (NAISS), partially funded by the Swedish Research Council through Grant Agreements No. 2022-06725 and No. 2018-05973, and by the CSCIT Center for Science, Finland. O.E and E.D. acknowledge support from the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation (KAW)
