ИСТИНА

Intermetallic compounds with cubic crystal structure of the PtHg4 type demonstrate unusually rich variety of thermodynamic properties. In particular, CrGa4 can be described as a bad nonmagnetic metal with the Fermi level located near a pseudo-gap, which is formed by the strong d-p hybridization. In contrast, the isostructural compound MnGa4 exhibits a typical metallic behavior. Our neutron diffraction experiments show that MnGa4 is antiferromagnetically ordered at least up to room temperature. In this work we report on ab-initio calculations of electric field gradient (EFG) as well as NQR spectroscopy study of CrGa4 and MnGa4.