Yao Zhang, Jie-Sheng Chen, Jie Ma, Jiamin Ni, Masaki Imai, Chishiro Michioka, Yuta Hadano, Marcos A Avila, Toshiro Takabatake, Shiyan Li, Kazuyoshi Yoshimura
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 FeGa3- 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...
March 27, 2018: Proceedings of the National Academy of Sciences of the United States of America