Among Fe-based ferromagnets, La(FexSi1−x)13 compounds are the first example realizing the itinerant-electron metamagnetic transition from the paramagnetic to the ferromagnetic state, accompanied by a marked magnetovolume effects. The effect of pressure on the Curie temperature is one order larger than that on the spontaneous magnetization in analogy with the results for Fe-Pt invar-type alloys. The large pressure coefficient of TC, d ln TC/dP, is attributed to the renormalization effect caused by spin fluctuations for free energy. The metamagnetic transition and the marked magnetovolume effects in the present compounds are related to the characteristic 3d band structures in analogy with Fe-Pt alloys in both the ferromagnetic and paramagnetic states.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2003|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics