%0 Journal Article
%A Frandsen, Benjamin A.
%A Gong, Zizhou
%A Terban, Maxwell W.
%A Banerjee, Soham
%A Chen, Bijuan
%A Jin, Changqing
%A Feygenson, Mikhail
%A Uemura, Yasutomo J.
%A Billinge, Simon J. L.
%T Local atomic and magnetic structure of dilute magnetic semiconductor (Ba , K) (Zn , Mn)$_{2}$ As$_{2}$
%J Physical review / B
%V 94
%N 9
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2016-05536
%P 094102
%D 2016
%X We have studied the atomic and magnetic structure of the dilute ferromagnetic semiconductor system (Ba,K)(Zn,Mn)2As2 through atomic and magnetic pair distribution function analysis of temperature-dependent x-ray and neutron total scattering data. We detected a change in curvature of the temperature-dependent unit cell volume of the average tetragonal crystallographic structure at a temperature coinciding with the onset of ferromagnetic order. We also observed the existence of a well-defined local orthorhombic structure on a short length scale of ≲5Å, resulting in a rather asymmetrical local environment of the Mn and As ions. Finally, the magnetic PDF revealed ferromagnetic alignment of Mn spins along the crystallographic c axis, with robust nearest-neighbor ferromagnetic correlations that exist even above the ferromagnetic ordering temperature. We discuss these results in the context of other experiments and theoretical studies on this system.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000382718900001
%R 10.1103/PhysRevB.94.094102
%U https://juser.fz-juelich.de/record/819969