Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Caloric Effects in Ferromagnetic Materials
MA 22.5: Vortrag
Mittwoch, 19. März 2025, 10:30–10:45, H19
Effect of boron doping on the magnetocaloric properties in La(Fe, Si)13 — •M. Straßheim1,2, C. Salazar-Mejía1, J. Wosnitza1,2, and T. Gottschall1 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2TU Dresden, Dresden, Germany
Traditional refrigeration methods rely on gases and toxic refrigerants, contributing to environmental degradation and energy inefficiencies. In contrast, magnetocaloric materials offer a promising alternative, with the ability to produce large, reversible thermal changes when exposed to magnetic fields. Among these, La(Fe,Si)13-based compounds stand out due to their excellent magnetocaloric effect at near-room temperatures, relatively high transition temperatures, and comparatively low cost of the base elements, making them ideal candidates for practical applications. The influence of elements such as hydrogen and carbon on interstitial sites of the La(Fe,Si)13 lattice is already well understood, but boron doping is not. We present a study of the latter in regard of magnetization and transition temperature with a perspective of both room-temperature and cryogenic applications.
Keywords: magnetocaloric; La-Fe-Si; magnetostructural transition