LaFeSi13based
LaFeSi13-based compounds are a family of iron-based intermetallics characterized by a NaZn13-type cubic crystal structure. They are typically described by the formula LaFe13−xSix (0 ≤ x ≤ about 1.7) or closely related compositions such as LaFe11.5Si1.5, with silicon partially substituting for iron. The structure features a lanthanum atom in a large cage surrounded by a framework of iron and silicon atoms; various dopants can be added to adjust properties.
These materials exhibit ferromagnetism with a tunable Curie temperature. In many compositions the magnetic transition is
Tuning and variants: Silicon content controls Tc and the strength of the magnetocaloric response. Hydrogenation to
Synthesis and structure: Typical preparation involves arc melting in an inert atmosphere followed by homogenization and
Applications and research: LaFeSi13-based materials are studied as potential candidates for environmentally friendly magnetic refrigeration and