Transitions from a Kondo-like diamagnetic insulator into a modulated ferromagnetic metal in FeGa_3-yGe_y.

ABSTRACT: One initial and essential question of magnetism is whether the magnetic properties of a material are governed by localized moments or itinerant electrons. Here, we expose the case for the weakly ferromagnetic system FeGa_3-y Ge _y , wherein these two opposite models are reconciled, such that the magnetic susceptibility is quantitatively explained by taking into account the effects of spin-spin correlation. With the electron doping introduced by Ge substitution, the diamagnetic insulating parent compound FeGa₃ becomes a paramagnetic metal as early as at y=0.01, and turns into a weakly ferromagnetic metal around the quantum critical point y=0.15. Within the ferromagnetic regime of FeGa_3-y Ge _y , the magne

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC5879657 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature