Investigation of role of antisite disorder in the pristine cage compound FeGa₃

2022/08/18 by C. Kaufmann Ribeiro, L. Mello, Ribeiro, C. Kaufmann +13
Physics and Astronomy · #Magnetic properties of thin films

paper · pdf · doi:10.48550/arxiv.2208.09064

Abstract

The role of controlled disorder in the strong correlated narrow gap semiconductor candidate FeGa₃ has been investigated. Polycrystalline samples were synthesized by the combination of arc-melting furnace and successive annealing processes. Deviations of the occupation number of Fe and Ga sites from those expected in the pristine compound were quantified with X-ray analysis. Besides that, electrical transport and magnetization measurements reveal that hierarchy in Fe and Ga site disorder tunes the ground state of FeGa₃ from paramagnetic semiconducting to a magnetic metal. These findings are discussed within the framework of Anderson metal-insulator transitions and spin fluctuations.

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