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- W4320854886 abstract "La(Fe$_x$Si$_{1-x}$)$_{13}$ and derived quaternary compounds are well-known for their giant, tunable, magneto- and barocaloric responses around a first-order paramagnetic-ferromagnetic transition near room temperature with low hysteresis. Remarkably, such a transition shows a large spontaneous volume change together with itinerant electron metamagnetic features. While magnetovolume effects are well-established mechanisms driving first-order transitions, purely electronic sources have a long, subtle history and remain poorly understood. Here we apply a disordered local moment picture to quantify electronic and magnetoelastic effects at finite temperature in La(Fe$_x$Si$_{1-x}$)$_{13}$ from first-principles. We obtain results in very good agreement with experiment and demonstrate that the magnetoelastic coupling drives the first-order character and causes at the same time a huge electronic entropy contribution to the caloric response." @default.
- W4320854886 created "2023-02-16" @default.
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- W4320854886 date "2023-02-13" @default.
- W4320854886 modified "2023-09-28" @default.
- W4320854886 title "Quantification of electronic and magnetoelastic mechanisms of first-order magnetic phase transitions from first principles: application to caloric effects in La(Fe$_x$Si$_{1-x}$)$_{13}$" @default.
- W4320854886 doi "https://doi.org/10.48550/arxiv.2302.06484" @default.
- W4320854886 hasPublicationYear "2023" @default.
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