We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe3Mo3N. Magnetic susceptibility shows a Curie-Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by 57Fe-Mos̈sbauer and neutron diffraction measurements. C=T shows a divergent behavior following -log T at low temperatures and reaches 128 mJ/(f.u.molK2) at 0.5 K. The deviation from the T2s power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed C/T and X are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe 3Mo3N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.
- Ferromagnetic quantum critical point
- Non-Fermi liquid
ASJC Scopus subject areas
- Physics and Astronomy(all)