Antiferromagnetic ordering and structural phase transition in Ba2Fe2As2 with Sn incorporated from the growth flux

Y. Su,1,* P. Link,2 A. Schneidewind,3 Th. Wolf,4 P. Adelmann,4 Y. Xiao,5 M. Meven,2 R. Mittal,1,6 M. Rotter,7 D. Johrendt,7 Th. Brueckel,1,5 and M. Loewenhaupt3 1Juelich Centre for Neutron Science, IFF, Forschungszentrum Juelich, Outstation at FRM II, Lichtenbergstrasse 1, D-85747 Garching, Germany 2FRM II, Technische Universitaet Muenchen, Lichtenbergstrasse 1, D-85747 Garching, Germany 3Institut fuer Festkoerperphysik, Technische Universitaet Dresden, D-01062 Dresden, Germany 4Forschungszentrum Karlsruhe, Institut fuer Festkoerperphysik, D-76021 Karlsruhe, Germany 5Institut fuer Festkoerperforschung, Forschungszentrum Juelich, D-52425 Juelich, Germany 6Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India 7Department Chemie und Biochemie, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5-13 (Haus D), D-81377 Muenchen, Germany Received 8 August 2008; revised manuscript received 6 January 2009; published 3 February 2009