Electronic structure and magnetic properties of RT4Al8 (R = Sc, Y, La, Lu; T = Fe, Mn, Cr) compounds. Hydrostatic pressure effect
I.P. Zhuravleva1, G.E. Grechnev1, A.S. Panfilov1, A.А. Lyogenkaya1, O.V. Kotlyar1, А.V. Fedorchenko1, 2, and A. Feher2
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Prospekt Nauky, Kharkiv 61103, Ukraine
2Institute of Physics, Faculty of Science, P.J. Šafárik University in Košice, Košice 04154, Slovakia
Received February 25, 2016
We present results of theoretical and experimental studies of the electronic structures and magnetic properties of RFe4Al8, RMn4Al8 and RCr4Al8 compounds with non-magnetic elements, R = Sc, Y, La, Lu. The calculations of electronic spectra and field induced magnetic moments, and also their dependences on the unit cell volume, were carried out for the paramagnetic phases of RT4Al8 systems. These calculations were supplemented with measurements of magnetic susceptibilities of representative RT4Al8 compounds as functions of temperature and hydrostatic pressure.
PACS: 71.20.Eh Rare earth metals and alloys; PACS: 71.15.Mb Density functional theory, local density approximation, gradient and other corrections; PACS: 75.80.+q Magnetomechanical effects, magnetostriction.
Key words: RТ4Al8, magnetic susceptibility, superconductivity, magnetovolume effect.