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\begin{document}
\title{Effect of alloying on magnetism and electronic structure of Gd(In$_{1-x}$Sn$_x$)$_3$ system~--~{\em ab initio} study}
\author{\underline{J. Deniszczyk}}
\affiliation{Institute of Materials Science, University of Silesia, 41-500 Chorz{\'o}w, Poland}
\author{A. Bajorek}
\affiliation{Institute of Physics, University of Silesia, 40-007 Katowice, Poland}
\author{G. Che{\l}kowska}
\affiliation{Institute of Physics, University of Silesia, 40-007 Katowice, Poland}
\author{E. Zipper}
\affiliation{Institute of Physics, University of Silesia, 40-007 Katowice, Poland}
\begin{abstract}
The magnetic properties and electronic structure of Gd(In$_{1-x}$Sn$_x$)$_3$
alloys were measured recently by means of different methods. The measurements
showed several intriguing properties of the alloys including multiple magnetic
phase transtions and oscilatory variation of magnetic parameters 
(e.g. N{\'e}el temperature, effective magnetic moment, paramagnetic Curie
temperature) upon the succesive In/Sn substitution. The XPS valence band
measurements indicated the correlation between the magnetic properties of the
alloys and their electronic structure near the Fermi level.

In the contribution we present an {\em ab initio} study of electronic and magnetic properties of Gd(In$_{1-x}$Sn$_x$)$_3$ alloys curried out with the 
use of FP-LAPW method. Our {\em ab initio} calculations revealed that the 
ground state magnetic structure of the alloys is antiferromagnetic and  
upon the In/Sn substitution the magnetic structure undergo transition,
changing the type of antiferromagnetic ordering from the $AFM$-I 
($\langle 0 0 1\rangle$) for the GdSn$_3$ compound to $AFM$-III 
($\langle 1 1 1\rangle$) for the GdIn$_3$ one, in agreement with the
M{\"o}ssbauer measurements. Moreover, calculations gave an explanation 
of  the oscilatory variation of density of states near Fermi level, showed 
by XPS measurements.

\end{abstract}
\maketitle

\end{document}
